三角数
wiki page uses template: https://dbpedia-live.demo.openlinksw.com/resource/Template:=
wiki page wiki link: https://dbpedia-live.demo.openlinksw.com/resource/Category:Figurate_numbers
description: número formado por obxectos colocados en forma de triangulo @gl
wiki page uses template: Template:Reflist
wiki page wiki link: https://dbpedia-live.demo.openlinksw.com/resource/1_+_2_+_3_+_4_+_⋯
wiki page wiki link: https://dbpedia-live.demo.openlinksw.com/resource/Square_number
wiki page external link: http://www.cut-the-knot.org/do_you_know/triSquare.shtml
wiki page wiki link: https://dbpedia-live.demo.openlinksw.com/resource/Group_stage
wiki page wiki link: https://dbpedia-live.demo.openlinksw.com/resource/Computus
wiki page wiki link: https://dbpedia-live.demo.openlinksw.com/resource/Cube_(algebra)
wiki page wiki link: https://dbpedia-live.demo.openlinksw.com/resource/Perfect_number
wiki page uses template: Template:Mvar
wiki page wiki link: https://dbpedia-live.demo.openlinksw.com/resource/Geometric_progression
wiki page uses template: Template:MathWorld
wiki page wiki link: https://dbpedia-live.demo.openlinksw.com/resource/Ramanujan_theta_function
description: número que puede recomponerse en la forma de un triángulo equilátero @es
width: 200
wiki page wiki link: https://dbpedia-live.demo.openlinksw.com/resource/Empty_sum
wiki page wiki link: https://dbpedia-live.demo.openlinksw.com/resource/Doubly_triangular_number
wiki page external link: http://rhubbarb.wordpress.com/2009/04/23/hypertetrahedral-polytopic-roots/
wiki page wiki link: https://dbpedia-live.demo.openlinksw.com/resource/Theta_function
wiki page uses template: Template:Sfrac
wiki page wiki link: https://dbpedia-live.demo.openlinksw.com/resource/Fermat_polygonal_number_theorem
title: Arithmetic series
wiki page uses template: Template:Short description
wiki page wiki link: https://dbpedia-live.demo.openlinksw.com/resource/Wacław_Sierpiński
wiki page wiki link: https://dbpedia-live.demo.openlinksw.com/resource/If_and_only_if
description: nombre figuré @fr
wiki page wiki link: https://dbpedia-live.demo.openlinksw.com/resource/Eureka_(word)
wiki page wiki link: https://dbpedia-live.demo.openlinksw.com/resource/Category:Triangles
wiki page wiki link: https://dbpedia-live.demo.openlinksw.com/resource/Depreciation
height: 200
wiki page external link: http://www.cut-the-knot.org/do_you_know/numbers.shtml%23square
wiki page wiki link: https://dbpedia-live.demo.openlinksw.com/resource/Recurrence_relation
wiki page wiki link: https://dbpedia-live.demo.openlinksw.com/resource/Dicuil
wiki page wiki link: https://dbpedia-live.demo.openlinksw.com/resource/Modular_arithmetic
wiki page wiki link: https://dbpedia-live.demo.openlinksw.com/resource/Cut-the-knot
wiki page wiki link: https://dbpedia-live.demo.openlinksw.com/resource/Category:Factorial_and_binomial_topics
urlname: TriangularNumber
wiki page uses template: Template:Break lines
description: numero rappresentabile in forma di triangolo @it
wiki page wiki link: https://dbpedia-live.demo.openlinksw.com/resource/Kazimierz_Szymiczek
wiki page wiki link: https://dbpedia-live.demo.openlinksw.com/resource/Integer_sequence
wiki page wiki link: https://dbpedia-live.demo.openlinksw.com/resource/Pythagoreans
wiki page wiki link: https://dbpedia-live.demo.openlinksw.com/resource/Limit_of_a_sequence
wiki page wiki link: https://dbpedia-live.demo.openlinksw.com/resource/Squared_triangular_number
wiki page wiki link: https://dbpedia-live.demo.openlinksw.com/resource/Multiplicative_inverse
caption: Proof without words that all hexagonal numbers are odd-sided triangular numbers
description: Zomm vun den Zuelen 1 bis n @lb
wiki page wiki link: https://dbpedia-live.demo.openlinksw.com/resource/4000_(number)
wiki page uses template: Template:SpringerEOM
description: Summe aus den Zahlen von 1 bis n @de
wiki page wiki link: https://dbpedia-live.demo.openlinksw.com/resource/Equilateral_triangle
wiki page wiki link: https://dbpedia-live.demo.openlinksw.com/resource/Binomial_coefficient
wiki page uses template: Template:Series (mathematics)
wiki page wiki link: https://dbpedia-live.demo.openlinksw.com/resource/Pronic_number
wiki page wiki link: https://dbpedia-live.demo.openlinksw.com/resource/Hexagonal_number
wiki page wiki link: https://dbpedia-live.demo.openlinksw.com/resource/Proof_without_words
title: Triangular Number
wiki page uses template: Template:Bi
wiki page uses template: Template:Section link
wiki page wiki link: https://dbpedia-live.demo.openlinksw.com/resource/Tetractys
wiki page wiki link: https://dbpedia-live.demo.openlinksw.com/resource/Category:Integer_sequences
wiki page uses template: Template:OEIS
wiki page uses template: Template:Classes of natural numbers
wiki page wiki link: https://dbpedia-live.demo.openlinksw.com/resource/Trapezoidal_number
wiki page uses template: Template:Figurate numbers
wiki page wiki link: https://dbpedia-live.demo.openlinksw.com/resource/Mersenne_prime
wiki page wiki link: https://dbpedia-live.demo.openlinksw.com/resource/Heptagonal_number
wiki page wiki link: https://dbpedia-live.demo.openlinksw.com/resource/Polygonal_number
wiki page wiki link: https://dbpedia-live.demo.openlinksw.com/resource/Category:Proof_without_words
wiki page wiki link: https://dbpedia-live.demo.openlinksw.com/resource/Tetrahedral_number
image width: 350