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Search: id:A013150
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A013150 sec(tanh(x)+arctan(x))=1+4/2!*x^2+48/4!*x^4+1344/6!*x^6+71680/8!*x^8... +0
1
1, 4, 48, 1344, 71680, 6134144, 766639104, 132845576192, 30189756186624, 8791995173601280, 3164834039610834944, 1391075516277863612416, 727593505575051704926208, 449845963881833812549697536 (list; graph; listen)
OFFSET

0,2
CROSSREFS

Sequence in context: A024255 A166231 A013145 this_sequence A011266 A100568 A112693

Adjacent sequences: A013147 A013148 A013149 this_sequence A013151 A013152 A013153

KEYWORD

nonn

AUTHOR

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

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Last modified December 11 12:57 EST 2009. Contains 170656 sequences.

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