A012430 sec(arctan(x)*sin(x))=1+12/4!*x^4-360/6!*x^6+24080/8!*x^8...

1, 0, 12, -360, 24080, -2640960, 420653376, -92737380736, 26980142475520, -10012413760149504, 4615824952212134912, -2587662789242232604672, 1733488941554235507937280, -1367558750121199449308119040

Offset

0,3

Links

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

Crossrefs

Sequence in context: A002674 A012552 A012385 * A012632 A081791 A166183

Adjacent sequences: A012427 A012428 A012429 * A012431 A012432 A012433

Keyword

sign

Author

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

Status

approved