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Search: id:A013254
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A013254 arctanh(log(x+1)-atan(x))=-1/2!*x^2+4/3!*x^3-6/4!*x^4-150/6!*x^6... +0
1
-1, 4, -6, 0, -150, 2280, -16520, 96320, -1053360, 17870400, -264765600, 3541824000, -51903131280, 904820280000, -17470217232000, 351612581299200, -7290584110742400, 157383219788121600 (list; graph; listen)
OFFSET

0,2

CROSSREFS

Sequence in context: A013251 A013247 A013248 this_sequence A094920 A010668 A107951

Adjacent sequences: A013251 A013252 A013253 this_sequence A013255 A013256 A013257

KEYWORD

sign

AUTHOR

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

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Last modified August 29 17:54 EDT 2008. Contains 143238 sequences.


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