OFFSET
1,1
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 1..200
R. C. Castillo, On the Sum of Corresponding Factorials and Triangular Numbers: Runsums, Trapezoids and Politeness, Asia Pacific Journal of Multidisciplinary Research, 3 (2015), 95-101.
FORMULA
E.g.f.: (1+x)*exp(x) - 2*log(1-x) - 1. - Robert Israel, Aug 30 2016
MAPLE
seq(2*(n-1)! + n + 1, n=1..30); # Robert Israel, Aug 30 2016
MATHEMATICA
Table[2 (n - 1)! + n + 1, {n, 23}] (* Michael De Vlieger, Aug 30 2016 *)
PROG
(Magma) [2*Factorial(n-1) + n + 1: n in [1..30]]; // Vincenzo Librandi, Aug 31 2016
CROSSREFS
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Aug 30 2016
STATUS
approved