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A012258 exp(arctanh(arcsin(x)))=1+x+1/2!*x^2+4/3!*x^3+13/4!*x^4+84/5!*x^5... 1
1, 1, 1, 4, 13, 84, 469, 4152, 32985, 370128, 3818601, 51861888, 658371429, 10494283968, 158197312701, 2894815734912, 50529852678321, 1043916757274880, 20707179214389201, 476720372375608320 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,4

LINKS

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

CROSSREFS

Sequence in context: A123333 A197752 A241905 * A012134 A088946 A131590

Adjacent sequences:  A012255 A012256 A012257 * A012259 A012260 A012261

KEYWORD

nonn

AUTHOR

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

STATUS

approved

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Last modified May 19 14:50 EDT 2019. Contains 323395 sequences. (Running on oeis4.)