A013138 cos(tanh(x)+tan(x))=1-4/2!*x^2+16/4!*x^4-448/6!*x^6+14592/8!*x^8...

1, -4, 16, -448, 14592, -705536, 65245184, -5385535488, 910402060288, -124371776831488, 30930578556583936, -6638266678020931584, 2186545615284171964416, -694382737827711997181952

Offset

0,2

Links

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

Crossrefs

Sequence in context: A000874 A061580 A037976 * A262546 A013006 A013001

Adjacent sequences: A013135 A013136 A013137 * A013139 A013140 A013141

Keyword

sign

Author

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

Status

approved