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A012129 tanh(arcsin(tanh(x)))=x-3/3!*x^3+41/5!*x^5-1243/7!*x^7+65681/9!*x^9... 0
1, -3, 41, -1243, 65681, -5335283, 616216121, -95919970123, 19349625251361, -4909180152449763, 1529770153928451401, -574346328696763158203, 255703860384773029976241, -133196988269151890206719443 (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: A012053 A012162 A012225 * A012035 A012016 A207993

Adjacent sequences:  A012126 A012127 A012128 * A012130 A012131 A012132

KEYWORD

sign

AUTHOR

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

STATUS

approved

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Last modified November 15 11:35 EST 2018. Contains 317238 sequences. (Running on oeis4.)