A012012 sec(sin(sin(x)))=1+1/2!*x^2-3/4!*x^4-27/6!*x^6+1145/8!*x^8...

1, 1, -3, -27, 1145, -8631, -1770123, 115778861, 4625206001, -1652588042607, 75500754980077, 36232528294816885, -8153373987817082007, -655897923302322394919, 753704651365381460774501

Offset

0,3

Links

Table of n, a(n) for n=0..14.

Crossrefs

Sequence in context: A377760 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