A012563 cosh(sinh(x)*arctan(x))=1+12/4!*x^4-120/6!*x^6+8400/8!*x^8...

1, 0, 12, -120, 8400, -600000, 73313856, -12123226752, 2695239655680, -769790431168512, 275082505104161792, -120207067043213252608, 63066575428691877122048, -39120958138480154972405760

Offset

0,3

Links

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

Crossrefs

Sequence in context: A009164 A012436 A012619 * A301898 A012441 A012373

Adjacent sequences: A012560 A012561 A012562 * A012564 A012565 A012566

Keyword

sign

Author

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

Status

approved