OFFSET
0,1
LINKS
G. C. Greubel, Table of n, a(n) for n = 0..400
FORMULA
a(n) = (n+1)!*(2^(n+2) -1) - n!*(2^(n+1) -1) for n>=0. - G. C. Greubel, Jan 19 2017
MATHEMATICA
a[n_] := (n - 1)! * (2^n - 1); Table[a[n+2] - a[n+1], {n, 0, 25}] (* G. C. Greubel, Jan 19 2017 *)
PROG
(PARI) for(n=0, 25, print1(( (n+1)!*(2^(n+2) -1) - n!*(2^(n+1) -1)), ", ")) \\ G. C. Greubel, Jan 19 2017
CROSSREFS
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Jan 15 2000
STATUS
approved