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Search: id:A012443
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A012443 sech(arctan(x)*arcsin(x))=1-12/4!*x^4+120/6!*x^6-1008/8!*x^8... +0
1
1, 0, -12, 120, -1008, -45120, -11491392, 1378925184, -443544192768, 53698137606144, -32840379055537152, 7093049054642411520, -6636093887068155801600, 2065820944848385959936000 (list; graph; listen)
OFFSET

0,3
CROSSREFS

Sequence in context: A067358 A061506 A059155 this_sequence A012274 A009035 A009140

Adjacent sequences: A012440 A012441 A012442 this_sequence A012444 A012445 A012446

KEYWORD

sign

AUTHOR

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

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Last modified July 25 07:41 EDT 2008. Contains 142293 sequences.

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