A009253 - OEIS

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A009253

Expansion of exp(tan(x)/cos(x)).

1, 1, 1, 6, 21, 112, 717, 4592, 38857, 318208, 3158329, 32169984, 363525789, 4399544320, 56250039237, 779244812288, 11210469917713, 173483433263104, 2783865475754737, 47421793222656000, 840008000833503141 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,4`
	MATHEMATICA	`Exp[ Tan[ x ]/Cos[ x ] ]`
	CROSSREFS	`Sequence in context: A083558 A060843 A026650 * A012840 A013320 A056308` `Adjacent sequences: A009250 A009251 A009252 * A009254 A009255 A009256`
	KEYWORD	`nonn,easy`
	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 February 13 08:12 EST 2012. Contains 205451 sequences.