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Search: id:A012696
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A012696 arctan(tanh(x)*tanh(x))=2/2!*x^2-16/4!*x^4+32/6!*x^6+18944/8!*x^8... +0
1
2, -16, 32, 18944, -1904128, 41160704, 41418432512, -13226611572736, 1026478445821952, 1419327244545818624, -990157599155377143808, 185269154824838954614784, 314145305969818487050207232 (list; graph; listen)
OFFSET

0,1
CROSSREFS

Adjacent sequences: A012693 A012694 A012695 this_sequence A012697 A012698 A012699

Sequence in context: A069256 A120069 A018975 this_sequence A012392 A009819 A018951

KEYWORD

sign

AUTHOR

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

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Last modified October 12 15:26 EDT 2008. Contains 144830 sequences.

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