A012049 - OEIS

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A012049

sec(sin(tanh(x)))=1+1/2!*x^2-7/4!*x^4+73/6!*x^6+209/8!*x^8...

1, 1, -7, 73, 209, -144271, 16935049, -1681509255, 121927140641, 7429711841377, -7368737635468135, 2672443484700215337, -714451608564077085455, 102412390388191040345041 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,3`
	CROSSREFS	`Sequence in context: A082719 A188465 A142053 * A012158 A139966 A175205` `Adjacent sequences: A012046 A012047 A012048 * A012050 A012051 A012052`
	KEYWORD	`sign`
	AUTHOR	`Patrick Demichel (dml(AT)hpfrcu03.france.hp.com)`

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Last modified February 17 14:19 EST 2012. Contains 206038 sequences.