A009240 Expansion of exp(tan(tan(x))).

1, 1, 1, 5, 17, 113, 673, 5669, 48033, 494081, 5387009, 65835109, 871869745, 12394430129, 192177458593, 3124415825605, 55316788832065, 1014225530028161, 20139680768683777, 411568350375102789

Offset: 0

Author

R. H. Hardin

Keywords

• nonn
• easy

Programs

Mathematica

Exp[ Tan[ Tan[ x ] ] ]

Extensions

Extended and signs tested Mar 15 1997 by Olivier Gérard.