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 A009791 E.g.f. tanh(sin(sin(x))) (odd powers only). 1
 1, -4, 68, -2584, 171344, -17464448, 2529148352, -493428887168, 124730546544896, -39649824402078720, 15479590269182063616, -7280988095409621465088, 4060943278418110382329856, -2650034901967494261760065536 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 LINKS Vincenzo Librandi, Table of n, a(n) for n = 0..100 EXAMPLE tanh(sin(sin(x))) = x - 4/3!*x^3 + 68/5!*x^5 - 2584/7!*x^7 +- ... MATHEMATICA With[{nn=30}, Take[CoefficientList[Series[Tanh[Sin[Sin[x]]], {x, 0, nn}], x] Range[0, nn-1]!, {2, -1, 2}]] (* Harvey P. Dale, Apr 17 2014 *) CROSSREFS Sequence in context: A302115 A009473 A009520 * A012484 A174809 A363427 Adjacent sequences: A009788 A009789 A009790 * A009792 A009793 A009794 KEYWORD sign AUTHOR R. H. Hardin EXTENSIONS Extended with signs by Olivier Gérard, Mar 15 1997 Prior Mathematica program replaced by Harvey P. Dale, Apr 17 2014 STATUS approved

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Last modified December 10 17:45 EST 2023. Contains 367713 sequences. (Running on oeis4.)