id:A046182 - OEIS Search Results

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Indices of triangular numbers which are also octagonal.

+0
3

1, 6, 153, 638, 15041, 62566, 1473913, 6130878, 144428481, 600763526, 14152517273, 58868694718, 1386802264321, 5768531318886, 135892469386233, 565257200556158, 13316075197586561, 55389437123184646 (list; graph; listen)

	OFFSET	`1,2`
	LINKS	`Eric Weisstein's World of Mathematics, Link to a section of The World of Mathematics.`
	FORMULA	`For n odd, a(n+2)=98a(n+1)-a(n)+48; for n even, a(n+1)=49a(n)+24+10(24a(n)^2+24*a(n)+16)^0.5 - Richard Choulet (richardchoulet(AT)yahoo.fr), Oct 03 2007, Oct 09 2007`
	CROSSREFS	`Cf. A046181, A046183, A046190.` `Cf. A046181 A046183.` `Sequence in context: A089482 A126679 A003766 this_sequence A092122 A003460 A128120` `Adjacent sequences: A046179 A046180 A046181 this_sequence A046183 A046184 A046185`
	KEYWORD	`nonn`
	AUTHOR	`Eric Weisstein (eric(AT)weisstein.com)`
	EXTENSIONS	`More terms from Richard Choulet (richardchoulet(AT)yahoo.fr), Oct 03 2007`

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Last modified July 26 13:41 EDT 2008. Contains 142293 sequences.

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