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A012595
sech(arcsinh(x)*exp(x))=1-1/2!*x^2-6/3!*x^3-15/4!*x^4+60/5!*x^5...
0
1, 0, -1, -6, -15, 60, 975, 5390, -10143, -563976, -5982945, -9594398, 788690001, 14618418100, 85743956207, -2026783258890, -64627785960767, -716881015039504, 7211897523161151, 458865700394648778
OFFSET
0,4
CROSSREFS
Sequence in context: A145638 A361567 A067665 * A012294 A219811 A255007
KEYWORD
sign
AUTHOR
Patrick Demichel (patrick.demichel(AT)hp.com)
STATUS
approved