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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 A125587 Adjacent sequences:  A009788 A009789 A009790 * A009792 A009793 A009794 KEYWORD sign AUTHOR 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 January 25 21:23 EST 2021. Contains 340427 sequences. (Running on oeis4.)