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A012012
sec(sin(sin(x)))=1+1/2!*x^2-3/4!*x^4-27/6!*x^6+1145/8!*x^8...
0
1, 1, -3, -27, 1145, -8631, -1770123, 115778861, 4625206001, -1652588042607, 75500754980077, 36232528294816885, -8153373987817082007, -655897923302322394919, 753704651365381460774501
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OFFSET
0,3
LINKS
Table of n, a(n) for n=0..14.
CROSSREFS
Sequence in context:
A085521
A009066
A279832
*
A229866
A305843
A192341
Adjacent sequences:
A012009
A012010
A012011
*
A012013
A012014
A012015
KEYWORD
sign
AUTHOR
Patrick Demichel (patrick.demichel(AT)hp.com)
STATUS
approved
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Last modified March 28 18:04 EDT 2024. Contains 371254 sequences. (Running on oeis4.)