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A013312
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tan(exp(x)-cos(x)) = x + 2/2!*x^2 + 3/3!*x^3 + 24/4!*x^4 + 157/5!*x^5...
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0
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0, 1, 2, 3, 24, 157, 962, 8575, 88816, 948025, 11551682, 158525499, 2329270152, 37012621141, 638280394754, 11767984017847, 230953513192672, 4823470878737521, 106685348433700994, 2489115873636707187
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OFFSET
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0,3
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LINKS
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FORMULA
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a(n) ~ n! / ((exp(r) + sin(r)) * r^(n+1)), where r = 0.814158996828781376878265969211452855533947645871032054776582... is the root of the equation exp(r)-cos(r) = Pi/2. - Vaclav Kotesovec, Feb 06 2015
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MATHEMATICA
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With[{nn=20}, CoefficientList[Series[Tan[Exp[x]-Cos[x]], {x, 0, nn}], x] Range[0, nn]!] (* Harvey P. Dale, Nov 24 2011 *)
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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Patrick Demichel (patrick.demichel(AT)hp.com)
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STATUS
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approved
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