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Search: id:A012259
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A012259 exp(arctanh(tan(x)))=1+x+1/2!*x^2+5/3!*x^3+17/4!*x^4+121/5!*x^5... +0
1
1, 1, 1, 5, 17, 121, 721, 6845, 58337, 698161, 7734241, 111973685, 1526099057, 25947503401, 419784870961, 8200346492525, 153563504618177, 3389281372287841, 72104198836466881, 1774459993676715365 (list; graph; listen)
OFFSET

0,4
CROSSREFS

Sequence in context: A067710 A009240 A012174 this_sequence A113936 A012263 A076448

Adjacent sequences: A012256 A012257 A012258 this_sequence A012260 A012261 A012262

KEYWORD

nonn

AUTHOR

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

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Last modified August 29 16:48 EDT 2008. Contains 143238 sequences.

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