A009800 Expansion of tanh(sin(x)*x).

0, 2, -4, -234, 6712, 352810, -51057612, -1023950914, 1108394851184, -71310362507694, -51164568485366420, 13196238860000066662, 3757445119118639509416, -2956206137979802134429574

Offset

0,2

Links

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

Mathematica

Tanh[ Sin[ x ]*x ] (* Even Part *)

Crossrefs

Cf. A024243.

Sequence in context: A012556 A329418 A018729 * A018742 A255891 A018747

Adjacent sequences: A009797 A009798 A009799 * A009801 A009802 A009803

Keyword

sign

Author

R. H. Hardin

Extensions

Extended with signs by Olivier Gérard, Mar 15 1997

Status

approved