A013067 sech(sinh(x)+arctan(x))=1-4/2!*x^2+88/4!*x^4-5014/6!*x^6...

1, -4, 88, -5014, 538376, -93064954, 23605179172, -8256285769398, 3808207305952112, -2239609649656903474, 1635640402649689743132, -1452319030188781207688526, 1540754005662731974429453160

Offset

0,2

Links

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

Crossrefs

Sequence in context: A296465 A012946 A013101 * A012996 A195373 A065754

Adjacent sequences: A013064 A013065 A013066 * A013068 A013069 A013070

Keyword

sign

Author

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

Status

approved