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Search: id:A012453
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A012453 cosh(arctan(x)*tan(x))=1+12/4!*x^4+10640/8!*x^8-241920/10!*x^10... +0
1
1, 0, 12, 0, 10640, -241920, 75278016, -7539051520, 2338162028800, -550757434515456, 220140383085120512, -89874455859710427136, 48809245689148176896000, -29578326579043904251166720 (list; graph; listen)
OFFSET

0,3
CROSSREFS

Adjacent sequences: A012450 A012451 A012452 this_sequence A012454 A012455 A012456

Sequence in context: A012339 A012448 A012338 this_sequence A012454 A010208 A010209

KEYWORD

sign

AUTHOR

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

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Last modified May 16 01:24 EDT 2008. Contains 139630 sequences.

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