Talk:Octahedral number
Add topicLatest comment: 10 months ago by KlokkoVanDenBerg in topic Octahedral root
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[Untitled]
[edit]This article is to be expanded by giving a formula.
(moved from the article to this discussion page - Tεxτurε 19:49, 8 Apr 2004 (UTC))
Alternative formula
[edit]Try this: (4n3+2n)/6
~r3hall
Moderator of http://forums.delphiforums.com/figurate/start
- The OEIS gives the formula (2n^3 + n)/3, which is obviously the same as the same as the one you give but expressed in the lowest common denominator. PrimeFan (talk) 00:29, 20 December 2007 (UTC)
1156
[edit]1156 seems to be the only octahedral square number KlokkoVanDenBerg (talk) 01:07, 9 May 2021 (UTC)
- Not counting 0 and 1, you mean? Maybe, but we can't include this sort of information without published reliable sources. —David Eppstein (talk) 07:29, 9 May 2021 (UTC)
at least under 53.000.000.000 KlokkoVanDenBerg (talk) 23:52, 9 May 2021 (UTC)
Octahedral root
[edit]Is the concept of a octahedral root a thing? I recently addded the octahedral root of 2 to the OEIS KlokkoVanDenBerg (talk) 18:39, 30 September 2025 (UTC)