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Search: id:A012680
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A012680 arctan(tanh(x)*atan(x))=2/2!*x^2-16/4!*x^4+80/6!*x^6+14464/8!*x^8... +0
1
2, -16, 80, 14464, -1682432, 76011520, 26175092736, -10889734127616, 1790915255599104, 628448342217064448, -708415309969044275200, 277815404352915818676224, 89144743290434384702734336 (list; graph; listen)
OFFSET

0,1
CROSSREFS

Sequence in context: A034581 A028336 A045905 this_sequence A012684 A053587 A052346

Adjacent sequences: A012677 A012678 A012679 this_sequence A012681 A012682 A012683

KEYWORD

sign

AUTHOR

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

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

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