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Search: id:A012553
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A012553 sech(sinh(x)*tan(x))=1-12/4!*x^4-360/6!*x^6-4592/8!*x^8... +0
1
1, 0, -12, -360, -4592, 866880, 144205248, 10276506240, -1972062209792, -1066588240250880, -219129099375885312, 33054966279836497920, 54554661987210721497088, 24677742880461438548951040 (list; graph; listen)
OFFSET

0,3
CROSSREFS

Sequence in context: A053068 A046969 A074094 this_sequence A128043 A012431 A012386

Adjacent sequences: A012550 A012551 A012552 this_sequence A012554 A012555 A012556

KEYWORD

sign

AUTHOR

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

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Last modified November 29 12:46 EST 2009. Contains 167659 sequences.

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