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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 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,4

LINKS

Table of n, a(n) for n=0..19.

CROSSREFS

Sequence in context: A271018 A145638 A067665 * A012294 A219811 A255007

Adjacent sequences:  A012592 A012593 A012594 * A012596 A012597 A012598

KEYWORD

sign

AUTHOR

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

STATUS

approved

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Last modified April 3 23:48 EDT 2020. Contains 333207 sequences. (Running on oeis4.)