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Search: id:A013340
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A013340 arctanh(exp(x)-sech(x))=x+2/2!*x^2+3/3!*x^3+20/4!*x^4+165/5!*x^5... +0
1
1, 2, 3, 20, 165, 1142, 10983, 136040, 1753545, 25376042, 422373963, 7641560060, 149590274925, 3195495898142, 73536613981743, 1808159717424080, 47465557573756305, 1324783497842287442 (list; graph; listen)
OFFSET

0,2
CROSSREFS

Sequence in context: A128977 A069323 A009721 this_sequence A012416 A006246 A110372

Adjacent sequences: A013337 A013338 A013339 this_sequence A013341 A013342 A013343

KEYWORD

nonn

AUTHOR

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

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Last modified December 10 12:37 EST 2009. Contains 170569 sequences.

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