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Search: id:A012048
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A012048 arctanh(sin(tanh(x)))=x-1/3!*x^3+1/5!*x^5+55/7!*x^7-2207/9!*x^9... +0
1
1, -1, 1, 55, -2207, 79727, -2834207, 81045991, 1107720001, -715785186337, 165075476417857, -44818254949260905, 14626040239803925921, -5177396773524357363889, 1885895392048206524730145 (list; graph; listen)
OFFSET

0,4
CROSSREFS

Sequence in context: A049435 A004352 A053113 this_sequence A020536 A131557 A119166

Adjacent sequences: A012045 A012046 A012047 this_sequence A012049 A012050 A012051

KEYWORD

sign

AUTHOR

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

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Last modified July 19 08:04 EDT 2008. Contains 142098 sequences.

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