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Search: id:A012457
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A012457 sin(arctan(x)*atan(x))=2/2!*x^2-16/4!*x^4+248/6!*x^6-3456/8!*x^8... +0
2
2, -16, 248, -3456, -406368, 123982080, -31807263360, 9173875200000, -3114459024453120, 1251070155460915200, -591321674803999426560, 326012628782956574638080, -207713640106463567695994880 (list; graph; listen)
OFFSET

0,1
CROSSREFS

Sequence in context: A047657 A009233 A012462 this_sequence A138764 A009833 A009044

Adjacent sequences: A012454 A012455 A012456 this_sequence A012458 A012459 A012460

KEYWORD

sign

AUTHOR

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

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Last modified August 29 14:50 EDT 2008. Contains 143238 sequences.

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