

A012520


Expansion of e.g.f. arctan(sinh(x) * exp(x)).


1



0, 1, 2, 2, 16, 160, 688, 3152, 99584, 992000, 31232, 190094848, 3600265216, 20655831040, 737829988352, 25775848957952, 333499542339584, 4040309414625280, 311707129046499328, 7000770202915176448
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OFFSET

0,3


LINKS



EXAMPLE

x + 2/2!*x^2 + 2/3!*x^3  16/4!*x^4  160/5!*x^5 ...


MAPLE

seq(coeff(series(factorial(n)*arctan(sinh(x)*exp(x)), x, n+1), x, n), n=0..20); # Muniru A Asiru, Jul 19 2018


CROSSREFS



KEYWORD

sign


AUTHOR

Patrick Demichel (patrick.demichel(AT)hp.com)


EXTENSIONS



STATUS

approved



