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A012075
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Expansion of e.g.f.: exp(arcsin(tan(x)))=1+x+1/2!*x^2+4/3!*x^3+13/4!*x^4+76/5!*x^5...
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0
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1, 1, 1, 4, 13, 76, 421, 3424, 26713, 285136, 2871241, 38302144, 473357413, 7603381696, 111506036461, 2097552753664, 35624155784113, 768471264000256, 14838126699784081, 361133162545705984
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OFFSET
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0,4
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LINKS
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Table of n, a(n) for n=0..19.
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MATHEMATICA
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With[{nn=20}, CoefficientList[Series[Exp[ArcSin[Tan[x]]], {x, 0, nn}], x] Range[0, nn]!] (* Harvey P. Dale, Dec 12 2017 *)
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CROSSREFS
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Sequence in context: A144055 A012150 A012261 * A197942 A337286 A140417
Adjacent sequences: A012072 A012073 A012074 * A012076 A012077 A012078
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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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EXTENSIONS
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Definition clarified by Harvey P. Dale, Dec 12 2017
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STATUS
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approved
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