OFFSET
0,4
LINKS
H. Gingold, H. W. Gould, and M. E. Mays, Power product expansions, Util. Math., 34 (1988), 143-161.
EXAMPLE
1 + x + (1/2)*x^2 + (2/3)*x^3 + (5/24)*x^4 + (2/15)*x^5 + (41/360)*x^6 + (169/5040)*x^7 + ...
MATHEMATICA
nmax=28; Numerator[CoefficientList[Series[Product[ (1+x^n/n!), {n, nmax}], {x, 0, nmax}], x]] (* Stefano Spezia, Jun 24 2024 *)
CROSSREFS
KEYWORD
nonn,frac
AUTHOR
N. J. A. Sloane, Jan 30 2010
EXTENSIONS
a(28) from Stefano Spezia, Jun 24 2024
STATUS
approved