id:A003719 - OEIS Search Results

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Expansion of tan(x)*cosh(x).
(Formerly M3996)

+0
5

1, 5, 41, 685, 19921, 887765, 56126201, 4776869245, 526589630881, 72989204937125, 12424192360405961, 2547879762929443405, 619570064016825283441, 176273806836039238900085, 58010159408189457446855321, 21864887814006548202566779165 (list; graph; listen)

	OFFSET	`0,2`
	FORMULA	`a(n) = Sum_{k>=0} binomial(2n+1, 2k)*A000111(2n+1-2k) . - Philippe DELEHAM (kolotoko(AT)wanadoo.fr), Aug 27 2005`
	MATHEMATICA	`Tan[ x ]Cosh[ x ] ( Odd Part *)`
	CROSSREFS	`Bisection of A009739 and (apparently) A062272.` `Adjacent sequences: A003716 A003717 A003718 this_sequence A003720 A003721 A003722` `Sequence in context: A100288 A076094 A076131 this_sequence A052113 A093433 A065035`
	KEYWORD	`nonn`
	AUTHOR	`R. H. Hardin (rhh(AT)cadence.com)`
	EXTENSIONS	`Extended and formatted Mar 15 1997 by Olivier Gerard`

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Last modified October 13 02:37 EDT 2008. Contains 145008 sequences.

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