A012625 tan(arcsinh(x)*arctan(x))=2/2!*x^2-12/4!*x^4+478/6!*x^6-30072/8!*x^8...

2, -12, 478, -30072, 3298842, -533109060, 120154935990, -35890600460400, 13718452402856370, -6526678990152469500, 3781159226914921390350, -2620167311178014908602600, 2139645753650552865382712010

Offset

0,1

Links

Table of n, a(n) for n=0..12.

Crossrefs

Sequence in context: A009510 A091471 A357895 * A012630 A013173 A013147

Adjacent sequences: A012622 A012623 A012624 * A012626 A012627 A012628

Keyword

sign

Author

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

Status

approved