A012491 sec(cos(x)*arcsin(x))=1+1/2!*x^2-3/4!*x^4-75/6!*x^6+1337/8!*x^8...

1, 1, -3, -75, 1337, 144105, 3933237, 118760733, 129911988593, 47180864336337, 13805291952312685, 5130037600431416453, 2642764719782227835049, 1617152674535806453668025

Offset

0,3

Links

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

Crossrefs

Sequence in context: A125520 A163131 A060869 * A136328 A003690 A230143

Adjacent sequences: A012488 A012489 A012490 * A012492 A012493 A012494

Keyword

sign

Author

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

Status

approved