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Search: id:A012395
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A012395 sech(tan(x)*tan(x))=1-12/4!*x^4-480/6!*x^6-15792/8!*x^8... +0
2
1, 0, -12, -480, -15792, 387840, 232592448, 44951262720, 4538494871808, -1173690989322240, -1020600368000166912, -406075179314308669440, -50036577406600515366912, 87776293107173235762462720 (list; graph; listen)
OFFSET

0,3
CROSSREFS

Sequence in context: A112363 A089956 A003749 this_sequence A012687 A012467 A009083

Adjacent sequences: A012392 A012393 A012394 this_sequence A012396 A012397 A012398

KEYWORD

sign

AUTHOR

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

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Last modified September 5 01:44 EDT 2008. Contains 143476 sequences.

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