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Search: id:A012180
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A012180 tanh(tan(arctanh(x)))=x+2/3!*x^3+16/5!*x^5+48/7!*x^7-29696/9!*x^9... +0
1
1, 2, 16, 48, -29696, -6049792, -1262426112, -308569372672, -89297625350144, -30123113337716736, -11520007513318621184, -4775431672418431664128, -1952929261585732032528384, -545214673336986589066166272 (list; graph; listen)
OFFSET

0,2
CROSSREFS

Sequence in context: A023638 A139267 A063721 this_sequence A058376 A120948 A090453

Adjacent sequences: A012177 A012178 A012179 this_sequence A012181 A012182 A012183

KEYWORD

sign

AUTHOR

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

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Last modified August 28 22:44 EDT 2008. Contains 143251 sequences.

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