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Search: id:A012805
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A012805 arctan(sec(x)*atan(x))=x-1/3!*x^3+33/5!*x^5-1377/7!*x^7+99649/9!*x^9... +0
1
1, -1, 33, -1377, 99649, -11796673, 2017677153, -471591223841, 144742585812609, -56447611418620289, 27268126498786597537, -15985843319019939868385, 11182140682997302960743361 (list; graph; listen)
OFFSET

0,3
CROSSREFS

Adjacent sequences: A012802 A012803 A012804 this_sequence A012806 A012807 A012808

Sequence in context: A077420 A065424 A071268 this_sequence A093756 A120288 A099370

KEYWORD

sign

AUTHOR

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

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Last modified October 13 02:37 EDT 2008. Contains 145008 sequences.

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