A012138 cos(arcsin(arctanh(x)))=1-1/2!*x^2-11/4!*x^4-349/6!*x^6-22455/8!*x^8...

1, -1, -11, -349, -22455, -2465241, -416217603, -100729124469, -33198564667887, -14328891118054449, -7852649782447649403, -5329635152693662625805, -4388960085492355649955495

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