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Search: id:A012228
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A012228 arctanh(atan(tanh(x)))=x-2/3!*x^3+24/5!*x^5-944/7!*x^7+77952/9!*x^9... +0
1
1, -2, 24, -944, 77952, -10623744, 2145104896, -602082207744, 224357319278592, -107165894175948800, 63836869263529082880, -46390243522547859062784, 40392288941602607862906880 (list; graph; listen)
OFFSET

0,2
CROSSREFS

Sequence in context: A137274 A002032 A015212 this_sequence A062029 A122551 A136524

Adjacent sequences: A012225 A012226 A012227 this_sequence A012229 A012230 A012231

KEYWORD

sign

AUTHOR

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

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Last modified August 19 23:53 EDT 2008. Contains 142930 sequences.

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