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Search: id:A012044
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A012044 sec(sin(arcsinh(x)))=1+1/2!*x^2-3/4!*x^4+21/6!*x^6-647/8!*x^8... +0
1
1, 1, -3, 21, -647, 45161, -4655115, 671831421, -131445679375, 33601481453521, -10874248371483155, 4345212201159011301, -2101132542287329737623, 1209250716473417141359161 (list; graph; listen)
OFFSET

0,3
CROSSREFS

Sequence in context: A128679 A111432 A093549 this_sequence A098918 A001699 A162924

Adjacent sequences: A012041 A012042 A012043 this_sequence A012045 A012046 A012047

KEYWORD

sign

AUTHOR

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

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

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