A009168 Expansion of cosh(tan(x)^2).

1, 0, 12, 480, 25872, 2031360, 227781312, 34846855680, 6932161765632, 1724433365360640, 521307469175442432, 187630895361738301440, 79180079598904589094912, 38701262478049196612321280

Offset: 0

Author

R. H. Hardin

Keywords

• nonn

Programs

Mathematica

Cosh[ Tan[ x ]^2 ] (* Even Part *)

Extensions

Extended and signs tested Mar 15 1997 by Olivier Gérard.