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A012582
sec(arcsinh(x)*log(x+1))=1+12/4!*x^4-60/5!*x^5+210/6!*x^6-1260/7!*x^7...
0
1, 0, 0, 0, 12, -60, 210, -1260, 21168, -260064, 2442120, -26091120, 411273192, -6914670048, 106449907200, -1707861486240, 32324814763008, -667333358292864, 13774375825919424, -293275396792404864
OFFSET
0,5
CROSSREFS
Sequence in context: A009148 A012581 A012288 * A260356 A120571 A086950
KEYWORD
sign
AUTHOR
Patrick Demichel (patrick.demichel(AT)hp.com)
STATUS
approved