A012163 cos(tan(arcsinh(x)))=1-1/2!*x^2-3/4!*x^4-21/6!*x^6+185/8!*x^8...

1, -1, -3, -21, 185, -9641, 1668021, -192801597, 42064398961, -10576096455505, 3476312353756781, -1396500495046819941, 679259896835809126697, -392775363671591649764601

Offset

0,3

Links

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

Crossrefs

Sequence in context: A131763 A006199 A083063 * A012055 A344896 A378669

Adjacent sequences: A012160 A012161 A012162 * A012164 A012165 A012166

Keyword

sign

Author

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

Status

approved