A024291 Expansion of tan(x)*sinh(tan(x))/2.

0, 1, 10, 219, 8340, 486517, 40126366, 4429823055, 629201874216, 111601138953193, 24147604588944178, 6255175324250099907, 1910034333745099017660, 678640902986234659254877

Offset

0,3

Links

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

Mathematica

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

Crossrefs

A009746.

Sequence in context: A326208 A007698 A007699 * A024292 A094420 A053131

Adjacent sequences: A024288 A024289 A024290 * A024292 A024293 A024294

Keyword

nonn

Author

R. H. Hardin

Extensions

Extended and signs tested 03/97.

Status

approved