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A012659
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Expansion of e.g.f. arcsin(tanh(x) * exp(x)).
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0
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0, 1, 2, 2, 8, 80, 512, 3992, 47168, 588800, 7903232, 124255232, 2161507328, 40505429120, 829919658752, 18433385276672, 438231826239488, 11136829247959040, 301669044409475072, 8662857659856269312
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OFFSET
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0,3
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LINKS
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EXAMPLE
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x + 2/2!*x^2 + 2/3!*x^3 + 8/4!*x^4 + 80/5!*x^5 ...
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MAPLE
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seq(coeff(series(factorial(n)*arcsin(tanh(x)*exp(x)), x, n+1), x, n), n=0..20); # Muniru A Asiru, Jul 24 2018
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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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EXTENSIONS
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STATUS
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approved
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