A012631 cosh(arcsinh(x)*arctan(x))=1+12/4!*x^4-360/6!*x^6+20048/8!*x^8...

1, 0, 12, -360, 20048, -1794240, 235532352, -42633182592, 10177055117568, -3097788814190592, 1171100833288338432, -538330446029312133120, 295703061186623293870080, -191289947652383750277120000

Offset

0,3

Links

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

Crossrefs

Sequence in context: A012627 A012384 A012429 * A327986 A279182 A002674

Adjacent sequences: A012628 A012629 A012630 * A012632 A012633 A012634

Keyword

sign

Author

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

Status

approved