id:A087350 - OEIS Search Results

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a(n) = Sum_{k=0..n} (3*n)!/(3*k)!.

+0
2

1, 7, 841, 423865, 559501801, 1527439916731, 7478345832314977, 59677199741873516461, 724719913665311983902385, 12718834484826225317486856751, 309830808050366848733979830454361 (list; graph; listen)

	OFFSET	`0,2`
	FORMULA	`a(n) = floor((3n)!C) where C = 1/3exp(1)+2/3exp(-1/2)cos(1/23^(1/2)) = 1.16805831337591852551625692...`
	CROSSREFS	`Cf. A000522, A051396.` `Sequence in context: A014013 A001467 A047788 this_sequence A093171 A127102 A038808` `Adjacent sequences: A087347 A087348 A087349 this_sequence A087351 A087352 A087353`
	KEYWORD	`nonn`
	AUTHOR	`Vladeta Jovovic (vladeta(AT)Eunet.yu), Oct 20 2003`

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Last modified July 23 17:35 EDT 2008. Contains 142285 sequences.

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