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Search: id:A012508
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A012508 sech(cos(x)*arctan(x))=1-1/2!*x^2+25/4!*x^4-1105/6!*x^6+91313/8!*x^8... +0
1
1, -1, 25, -1105, 91313, -12232385, 2400320393, -649247356433, 231544408317537, -105271075840787713, 59429582363323624185, -40787189186519841731153, 33444147237661076070865681 (list; graph; listen)
OFFSET

0,3
CROSSREFS

Sequence in context: A012692 A066852 A123204 this_sequence A112102 A012799 A120694

Adjacent sequences: A012505 A012506 A012507 this_sequence A012509 A012510 A012511

KEYWORD

sign

AUTHOR

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

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

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