id:A052277 - OEIS Search Results

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(4n+2)!/2^(2n+1).

+0
7

1, 90, 113400, 681080400, 12504636144000, 548828480360160000, 49229914688306352000000, 8094874872198213459360000000, 2252447502438386084347676160000000, 997586474354936812896742294502400000000, 669959124447288464805194190141921792000000000 (list; graph; listen)

	OFFSET	`0,2`
	FORMULA	`sin(x)sinh(x)=sum(n>=0, (-1)^nx^(4n+2)/a(n)) - Benoit Cloitre (benoit7848c(AT)orange.fr), Feb 02 2002`
	CROSSREFS	`Sequence in context: A152255 A134648 A145413 this_sequence A066784 A135321 A135428` `Adjacent sequences: A052274 A052275 A052276 this_sequence A052278 A052279 A052280`
	KEYWORD	`nonn`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com), Feb 05 2000`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

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