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A012138 cos(arcsin(arctanh(x)))=1-1/2!*x^2-11/4!*x^4-349/6!*x^6-22455/8!*x^8... 1
1, -1, -11, -349, -22455, -2465241, -416217603, -100729124469, -33198564667887, -14328891118054449, -7852649782447649403, -5329635152693662625805, -4388960085492355649955495 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Table of n, a(n) for n=0..12.

CROSSREFS

Cf. A012251.

Sequence in context: A192841 A158788 A012220 * A067428 A171630 A303116

Adjacent sequences:  A012135 A012136 A012137 * A012139 A012140 A012141

KEYWORD

sign

AUTHOR

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

STATUS

approved

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Last modified August 3 08:53 EDT 2020. Contains 336197 sequences. (Running on oeis4.)