A024287 Expansion of sinh(tan(x)^2)/2.

0, 1, 8, 196, 10688, 937936, 113552768, 17875345216, 3555171842048, 875294104443136, 261970132442851328, 93711886717539460096, 39452759032211774455808, 19284289193322067327799296

Offset

0,3

Links

Table of n, a(n) for n=0..13.

Mathematica

Sinh[ Tan[ x ]^2 ]/2 (* Even Part *)

Crossrefs

A009613.

Sequence in context: A338806 A119299 A363986 * A208703 A304398 A020329

Adjacent sequences: A024284 A024285 A024286 * A024288 A024289 A024290

Keyword

nonn

Author

R. H. Hardin

Extensions

Extended and signs tested 03/97.

Status

approved