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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 (list; graph; refs; listen; history; text; internal format)
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 September 28 16:11 EDT 2021. Contains 347716 sequences. (Running on oeis4.)