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Search: id:A012009
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A012009 sech(log(cos(x)))=1-3/4!*x^4-30/6!*x^6-63/8!*x^8+12540/10!*x^10... +0
1
1, 0, -3, -30, -63, 12540, 602877, 6625710, -1991169183, -241970036520, -7540177734243, 2917041754949850, 699983161534169697, 46722975483964508820, -21334067257986056115363 (list; graph; listen)
OFFSET

0,3
CROSSREFS

Sequence in context: A095045 A061472 A132084 this_sequence A001800 A152767 A035328

Adjacent sequences: A012006 A012007 A012008 this_sequence A012010 A012011 A012012

KEYWORD

sign

AUTHOR

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

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Last modified December 3 22:15 EST 2009. Contains 170310 sequences.

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