A012669 - OEIS

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A012669

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

2, 352, 1140992, 18447112192, 921987413245952, 110532127751546601472, 27112825353492257048625152, 12196239245956706589164638830592 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,1`
	EXAMPLE	`tan(tanh(x)tan(x))=2/2!x^2+352/6!x^6+1140992/10!x^10...`
	MATHEMATICA	`Tan[ Tanh[ x ]Tan[ x ] ] ( [ x^(4n+2) ] *)`
	CROSSREFS	`Sequence in context: A064023 A179959 A024350 * A187523 A172860 A164700` `Adjacent sequences: A012666 A012667 A012668 * A012670 A012671 A012672`
	KEYWORD	`nonn`
	AUTHOR	`Patrick Demichel (dml(AT)hpfrcu03.france.hp.com)`

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Last modified February 16 10:07 EST 2012. Contains 205904 sequences.