triangular number

figurate number

Wikidata entity: Q245102

Wikimedia Commons category is Triangular numbers

P373 Commons category String Triangular numbers ???
P2534 defining formula Math Δn=(n+12)=n(n+1)2,n≥1 ???
P1343 described by source ... Q19219752 (Meyers Konversations-Lexikon, 4th edition (1885–1890)) Meyers Konversations-Lexikon, 4th edition (1885–1890)
P7235 in defining formula Math n ???
P7235 in defining formula Math Δn ???
P31 instance of ... Q77358734 (type of integer) type of integer
P6104 maintained by WikiProject ... Q8487137 (WikiProject Mathematics) WikiProject Mathematics
P279 subclass of ... Q836270 (polygonal number) polygonal number
P910 topic's main category ... Q28372677 (Category:Triangular numbers) Category:Triangular numbers
External Ids
P7033Australian Educational Vocabulary IDscot/13463
P2581BabelNet ID01420185n
P2581BabelNet ID01420185n
P1417Encyclopædia Britannica Online IDtopic/triangular-number
P646Freebase ID/m/01fbc7
P2812MathWorld IDTriangularNumber
P6366Microsoft Academic ID (discontinued)67518608
P829OEIS IDA000217

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