OFFSET
0,2
LINKS
G. C. Greubel, Table of n, a(n) for n = 0..445
FORMULA
From G. C. Greubel, Mar 20 2021: (Start)
a(n) = 2*A001563(n) + 1.
E.g.f.: exp(x) + 2*x/(1-x)^2. (End)
MAPLE
MATHEMATICA
Table[1 + 2*n*n!, {n, 0, 30}]
PROG
(Magma) [1 + 2*n*Factorial(n): n in [0..30]]; // G. C. Greubel, Mar 20 2021
(Sage) [1 + 2*n*factorial(n) for n in (0..30)] # G. C. Greubel, Mar 20 2021
CROSSREFS
KEYWORD
nonn
AUTHOR
Roger L. Bagula, Jan 21 2009
STATUS
approved