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A012659 Expansion of e.g.f. arcsin(tanh(x) * exp(x)). 0
0, 1, 2, 2, 8, 80, 512, 3992, 47168, 588800, 7903232, 124255232, 2161507328, 40505429120, 829919658752, 18433385276672, 438231826239488, 11136829247959040, 301669044409475072, 8662857659856269312 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Table of n, a(n) for n=0..19.

EXAMPLE

x + 2/2!*x^2 + 2/3!*x^3 + 8/4!*x^4 + 80/5!*x^5 ...

MAPLE

seq(coeff(series(factorial(n)*arcsin(tanh(x)*exp(x)), x, n+1), x, n), n=0..20); # Muniru A Asiru, Jul 24 2018

CROSSREFS

Sequence in context: A000615 A297010 A012413 * A009448 A012410 A295382

Adjacent sequences: A012656 A012657 A012658 * A012660 A012661 A012662

KEYWORD

nonn

AUTHOR

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

EXTENSIONS

a(0) inserted and title improved by Sean A. Irvine, Jul 23 2018

STATUS

approved

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Last modified April 1 03:44 EDT 2023. Contains 361673 sequences. (Running on oeis4.)