A012667 - OEIS

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A012667

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

2, -8, -159328, -1254489728, -20109957303808, -562928915963168768, -18213125504516311441408, 1487241135313514473061711872, 1254993904880106790594284355715072 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`0,1`
	LINKS	`Table of n, a(n) for n=0..8.`
	FORMULA	`G.f.: sin(tanh(x)*tan(x)).`
	EXAMPLE	`sin(tanh(x)tan(x)) = 2/2!x^2-8/6!x^6-159328/10!x^10...`
	MATHEMATICA	`Sin[ Tanh[ x ]Tan[ x ] ] ( [ x^(4n+2) ] *)`
	CROSSREFS	`Sequence in context: A081979 A012672 A024340 * A124075 A260548 A019315` `Adjacent sequences: A012664 A012665 A012666 * A012668 A012669 A012670`
	KEYWORD	`sign`
	AUTHOR	`Patrick Demichel (patrick.demichel(AT)hp.com)`
	STATUS	`approved`

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Last modified January 30 21:42 EST 2023. Contains 359947 sequences. (Running on oeis4.)