A009762 - OEIS

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A009762

Expansion of tan(x)/cosh(tan(x)).

1, -1, -19, -253, -1415, 164999, 15064037, 949320395, 44870780017, 1646995429391, 436144142262365, 216025221401835155, 72522443306062946281, 18012134571875515731095, 2730160186702754555432789 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,3`
	MATHEMATICA	`Tan[ x ]/Cosh[ Tan[ x ] ] (* Odd Part *)`
	CROSSREFS	`Sequence in context: A018912 A021202 A125454 * A017952 A055433 A185425` `Adjacent sequences: A009759 A009760 A009761 * A009763 A009764 A009765`
	KEYWORD	`sign`
	AUTHOR	`R. H. Hardin (rhhardin(AT)att.net)`
	EXTENSIONS	`Extended with signs Mar 15 1997 by Olivier Gerard.`

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Last modified February 14 05:35 EST 2012. Contains 205570 sequences.