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A009473 Expansion of sin(sin(tanh(x))). 0
1, -4, 68, -2472, 152144, -14034560, 1799730624, -304857999232, 65741679927552, -17551668357299200, 5675908680156886016, -2184408933211162445824, 986028359061107747639296, -515674384290974756211654656 (list; graph; refs; listen; history; text; internal format)
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

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Last modified October 26 18:09 EDT 2020. Contains 338027 sequences. (Running on oeis4.)