id:A087125 - OEIS Search Results

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Indices n of hex numbers H(n) that are also triangular.

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0, 5, 54, 539, 5340, 52865, 523314, 5180279, 51279480, 507614525, 5024865774, 49741043219, 492385566420, 4874114620985, 48248760643434, 477613491813359, 4727886157490160, 46801248083088245 (list; graph; listen)

	OFFSET	`0,2`
	LINKS	`Eric Weisstein's World of Mathematics, Hex Number`
	FORMULA	`G.f.: (-x^2+5x)/[(1-x)(1-10x+x^2)].`
	CROSSREFS	`Cf. A006244, A031138.` `Sequence in context: A083757 A093674 A129664 this_sequence A110430 A110432 A132619` `Adjacent sequences: A087122 A087123 A087124 this_sequence A087126 A087127 A087128`
	KEYWORD	`nonn`
	AUTHOR	`Eric Weisstein (eric(AT)weisstein.com), Aug 14, 2003`

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Last modified July 26 23:19 EDT 2008. Contains 142293 sequences.

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