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Search: id:A012227
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A012227 tanh(arctan(tanh(x)))=x-6/3!*x^3+176/5!*x^5-12016/7!*x^7... +0
2
1, -6, 176, -12016, 1469696, -280971776, 77198422016, -28793654081536, 13988424620507136, -8578076577450295296, 6478101995566379565056, -5906079803365219349037056, 6394716233788355978540875776 (list; graph; listen)
OFFSET

0,2
CROSSREFS

Cf. A101921.

Sequence in context: A134632 A024277 A012177 this_sequence A012152 A165928 A024278

Adjacent sequences: A012224 A012225 A012226 this_sequence A012228 A012229 A012230

KEYWORD

sign

AUTHOR

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

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Last modified November 25 14:49 EST 2009. Contains 167514 sequences.

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