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A012430
sec(arctan(x)*sin(x))=1+12/4!*x^4-360/6!*x^6+24080/8!*x^8...
0
1, 0, 12, -360, 24080, -2640960, 420653376, -92737380736, 26980142475520, -10012413760149504, 4615824952212134912, -2587662789242232604672, 1733488941554235507937280, -1367558750121199449308119040
OFFSET
0,3
CROSSREFS
Sequence in context: A002674 A012552 A012385 * A012632 A081791 A166183
KEYWORD
sign
AUTHOR
Patrick Demichel (patrick.demichel(AT)hp.com)
STATUS
approved