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Search: id:A013205
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A013205 log(sech(x)+arctan(x))=x-2/2!*x^2+3/3!*x^3-8/4!*x^4+53/5!*x^5... +0
1
1, -2, 3, -8, 53, -320, 1799, -14464, 154985, -1601152, 16589771, -211517440, 3172731677, -47440986112, 721614303695, -12501759557632, 241340829836497, -4730336839303168, 94965599172723859 (list; graph; listen)
OFFSET

0,2
CROSSREFS

Sequence in context: A126464 A041979 A001686 this_sequence A042365 A072043 A095203

Adjacent sequences: A013202 A013203 A013204 this_sequence A013206 A013207 A013208

KEYWORD

sign

AUTHOR

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

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Last modified August 29 14:50 EDT 2008. Contains 143238 sequences.

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