A012743 cos(arctanh(x)*cos(x))=1-1/2!*x^2+5/4!*x^4-85/6!*x^6-887/8!*x^8...

1, -1, 5, -85, -887, -145865, -14963507, -2554796829, -556819358703, -157094249035537, -55286734778859115, -23786315258989816933, -12282781149659030865767, -7498816363839210619416025

Offset

0,3

Links

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

Crossrefs

Sequence in context: A198586 A121290 A201797 * A359234 A139744 A195156

Adjacent sequences: A012740 A012741 A012742 * A012744 A012745 A012746

Keyword

sign

Author

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

Status

approved