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A012743
cos(arctanh(x)*cos(x))=1-1/2!*x^2+5/4!*x^4-85/6!*x^6-887/8!*x^8...
0
1, -1, 5, -85, -887, -145865, -14963507, -2554796829, -556819358703, -157094249035537, -55286734778859115, -23786315258989816933, -12282781149659030865767, -7498816363839210619416025
OFFSET
0,3
CROSSREFS
Sequence in context: A198586 A121290 A201797 * A359234 A139744 A195156
KEYWORD
sign
AUTHOR
Patrick Demichel (patrick.demichel(AT)hp.com)
STATUS
approved