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Search: id:A013151
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A013151 sech(tanh(x)+arctan(x))=1-4/2!*x^2+112/4!*x^4-7744/6!*x^6... +0
1
1, -4, 112, -7744, 995840, -205558144, 62203595776, -25948859891712, 14273513699311616, -10010170584339742720, 8717845696617764192256, -9230668213290446763196416, 11677592409577212192402440192 (list; graph; listen)
OFFSET

0,2
CROSSREFS

Sequence in context: A135917 A158450 A063406 this_sequence A006718 A085522 A078780

Adjacent sequences: A013148 A013149 A013150 this_sequence A013152 A013153 A013154

KEYWORD

sign

AUTHOR

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

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Last modified November 30 13:13 EST 2009. Contains 167758 sequences.

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