id:A009751 - OEIS Search Results

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Expansion of tan(x)*tan(tanh(x)).

+0
2

0, 2, 8, 48, 2176, 72704, 2567168, 320538624, 23648567296, 2869964963840, 550752408829952, 81617924549246976, 20769854695130791936, 5449382125873097867264, 1599364150040158382587904 (list; graph; listen)

	OFFSET	`0,2`
	MATHEMATICA	`Tan[ x ]Tan[ Tanh[ x ] ] ( Even Part *)`
	CROSSREFS	`Sequence in context: A079802 A009741 A009745 this_sequence A032116 A088181 A058864` `Adjacent sequences: A009748 A009749 A009750 this_sequence A009752 A009753 A009754`
	KEYWORD	`nonn`
	AUTHOR	`R. H. Hardin (rhhardin(AT)att.net)`
	EXTENSIONS	`Extended and signs tested Mar 15 1997 by Olivier Gerard.`

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Last modified December 7 23:50 EST 2009. Contains 170430 sequences.

AT&T Labs Research