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A012140 arcsinh(arcsin(arctanh(x)))=x+2/3!*x^3+32/5!*x^5+1336/7!*x^7... 0
1, 2, 32, 1336, 108800, 14701312, 2986596480, 852635258112, 325714440802304, 160437668874481664, 98998538588401238016, 74780329820590921056256, 67860526461080359727955968, 72835853250644384064569933824 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..13.

CROSSREFS

Sequence in context: A012093 A012214 A320419 * A268557 A281183 A012209

Adjacent sequences:  A012137 A012138 A012139 * A012141 A012142 A012143

KEYWORD

nonn

AUTHOR

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

STATUS

approved

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Last modified September 19 04:50 EDT 2020. Contains 337175 sequences. (Running on oeis4.)