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Search: id:A012464
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A012464 arctanh(atan(x)*atan(x))=2/2!*x^2-16/4!*x^4+608/6!*x^6-43776/8!*x^8... +0
1
2, -16, 608, -43776, 5490432, -1043742720, 281302333440, -101944270848000, 47833801306275840, -28212954337286553600, 20432760600063600230400, -17826780360146975037849600, 18441699370235590444905922560 (list; graph; listen)
OFFSET

0,1
CROSSREFS

Sequence in context: A013177 A060279 A012757 this_sequence A128294 A015188 A005118

Adjacent sequences: A012461 A012462 A012463 this_sequence A012465 A012466 A012467

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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