login
A012453
cosh(arctan(x)*tan(x))=1+12/4!*x^4+10640/8!*x^8-241920/10!*x^10...
0
1, 0, 12, 0, 10640, -241920, 75278016, -7539051520, 2338162028800, -550757434515456, 220140383085120512, -89874455859710427136, 48809245689148176896000, -29578326579043904251166720
OFFSET
0,3
CROSSREFS
Sequence in context: A012339 A012448 A012338 * A284453 A012454 A322732
KEYWORD
sign
AUTHOR
Patrick Demichel (patrick.demichel(AT)hp.com)
STATUS
approved