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Search: id:A012251
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A012251 exp(arcsinh(arctan(x)))=1+x+1/2!*x^2-2/3!*x^3-11/4!*x^4+24/5!*x^5... +0
3
1, 1, 1, -2, -11, 24, 349, -720, -22455, 40320, 2465241, -3628800, -416217603, 479001600, 100729124469, -87178291200, -33198564667887, 20922789888000, 14328891118054449, -6402373705728000, -7852649782447649403 (list; graph; listen)
OFFSET

0,4
CROSSREFS

Bisections are (-1)^n*A010050 and (-1)^n*A012138.

Sequence in context: A041803 A009189 A012213 this_sequence A077482 A141428 A104085

Adjacent sequences: A012248 A012249 A012250 this_sequence A012252 A012253 A012254

KEYWORD

sign

AUTHOR

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

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Last modified November 24 23:16 EST 2009. Contains 167481 sequences.

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