OFFSET
0,3
EXAMPLE
2/2!*x^2 - 3/3!*x^3 + 16/4!*x^4 - 50/5!*x^5 ...
CROSSREFS
KEYWORD
sign
AUTHOR
Patrick Demichel (patrick.demichel(AT)hp.com)
EXTENSIONS
a(0) and a(1) inserted and title improved by Sean A. Irvine, Jul 18 2018
STATUS
approved