OFFSET
0,3
EXAMPLE
x + 2/2!*x^2 + 3/3!*x^3 - 4/4!*x^4 - 67/5!*x^5 ...
CROSSREFS
KEYWORD
sign
AUTHOR
Patrick Demichel (patrick.demichel(AT)hp.com)
EXTENSIONS
a(0) inserted and title improved by Sean A. Irvine, Jul 17 2018
STATUS
approved