A012922 sec(arcsin(x)+sin(x))=1+4/2!*x^2+80/4!*x^4+4024/6!*x^6+380544/8!*x^8...

1, 4, 80, 4024, 380544, 57960864, 12957750912, 3995431992192, 1624807254577152, 842520079540277760, 542544550547724265472, 424772248087529271371776, 397354005571214204967354368

Offset

0,2

Links

Table of n, a(n) for n=0..12.

Crossrefs

Sequence in context: A002436 A013031 A012923 * A013090 A012042 A013139

Adjacent sequences: A012919 A012920 A012921 * A012923 A012924 A012925

Keyword

nonn

Author

Patrick Demichel (patrick.demichel(AT)hp.com)

Status

approved