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Search: id:A012844
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A012844 arctan(sec(x)*atanh(x))=x+3/3!*x^3-7/5!*x^5-917/7!*x^7-7183/9!*x^9... +0
1
1, 3, -7, -917, -7183, 3803987, 316369129, -40892465221, -12655402122271, 1539257113273507, 1652188971379360217, 198029913991075323147, -231213557728594141960239, -76270663840340687485107213 (list; graph; listen)
OFFSET

0,2
CROSSREFS

Sequence in context: A092568 A055624 A065244 this_sequence A104052 A062625 A101006

Adjacent sequences: A012841 A012842 A012843 this_sequence A012845 A012846 A012847

KEYWORD

sign

AUTHOR

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

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Last modified July 4 18:25 EDT 2008. Contains 140886 sequences.

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