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Search: id:A012351
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A012351 sech(arcsin(x)*arcsin(x))=1-12/4!*x^4-240/6!*x^6-1008/8!*x^8... +0
1
1, 0, -12, -240, -1008, 378240, 32163648, -363487488, -690754821888, -145507353366528, -11585562008128512, 3150884675987558400, 573373842109571665920, -1149448245885758287872000 (list; graph; listen)
OFFSET

0,3
CROSSREFS

Sequence in context: A034832 A089370 A089343 this_sequence A033469 A012544 A009052

Adjacent sequences: A012348 A012349 A012350 this_sequence A012352 A012353 A012354

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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