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Search: id:A012049
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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... +0
1
1, 1, -7, 73, 209, -144271, 16935049, -1681509255, 121927140641, 7429711841377, -7368737635468135, 2672443484700215337, -714451608564077085455, 102412390388191040345041 (list; graph; listen)
OFFSET

0,3
CROSSREFS

Sequence in context: A080794 A082719 A142053 this_sequence A012158 A139966 A027017

Adjacent sequences: A012046 A012047 A012048 this_sequence A012050 A012051 A012052

KEYWORD

sign

AUTHOR

Patrick Demichel (dml(AT)hpfrcu03.france.hp.com)

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Last modified December 15 00:47 EST 2009. Contains 170825 sequences.

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