A009473 Expansion of sin(sin(tanh(x))).

1, -4, 68, -2472, 152144, -14034560, 1799730624, -304857999232, 65741679927552, -17551668357299200, 5675908680156886016, -2184408933211162445824, 986028359061107747639296, -515674384290974756211654656

Offset

0,2

Links

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

Mathematica

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

Crossrefs

Sequence in context: A156470 A326288 A302115 * A009520 A009791 A012484

Adjacent sequences: A009470 A009471 A009472 * A009474 A009475 A009476

Keyword

sign

Author

R. H. Hardin

Extensions

Extended with signs by Olivier Gérard, Mar 15 1997

Status

approved