id:A009564 - OEIS Search Results

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Expansion of tanh(x)*tan(sin(x))/2.

+0
2

1, -60, 15120, -8648640, 8821612800, -14079294028800, 32382376266240000, -101421602465863680000, 415017197290314178560000, -2149789081963827444940800000 (list; graph; listen)

	OFFSET	`0,2`
	MATHEMATICA	`Sin[ x^2 ]/2 (* [ x^(4n+2) ] *)`
	CROSSREFS	`A024343.` `Sequence in context: A003750 A001525 A113424 this_sequence A001460 A003794 A068295` `Adjacent sequences: A009561 A009562 A009563 this_sequence A009565 A009566 A009567`
	KEYWORD	`sign`
	AUTHOR	`R. H. Hardin (rhh(AT)cadence.com)`
	EXTENSIONS	`Extended with signs 03/97.`

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Last modified July 25 07:41 EDT 2008. Contains 142293 sequences.

AT&T Labs Research