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Search: id:A012633
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A012633 sech(arcsinh(x)*arctan(x))=1-12/4!*x^4+360/6!*x^6-9968/8!*x^8... +0
1
1, 0, -12, 360, -9968, -20160, 62513088, -11126763648, 1288066390272, 19652873951232, -83472832434404352, 36956701107235768320, -9713959158890293555200, -340935340396162516992000 (list; graph; listen)
OFFSET

0,3
CROSSREFS

Sequence in context: A012431 A012386 A130213 this_sequence A009079 A012379 A012424

Adjacent sequences: A012630 A012631 A012632 this_sequence A012634 A012635 A012636

KEYWORD

sign

AUTHOR

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

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Last modified August 29 16:48 EDT 2008. Contains 143238 sequences.

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