OFFSET
3,2
COMMENTS
Original definition: Natural numbers of the form (n! - 3)/3.
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 3..300
FORMULA
E.g.f.: (6 - 3*x^2 - x^3)/(6*(1-x)) - exp(x). - G. C. Greubel, Oct 18 2018
MATHEMATICA
Table[(n! - 3)/3, {n, 3, 20}]
PROG
(Magma) [Factorial(n)/3 -1: n in [3..25]]; // Vincenzo Librandi, Jul 20 2011
(PARI) for(n=3, 25, print1((n!-3)/3, ", ")) \\ G. C. Greubel, Oct 18 2018
CROSSREFS
KEYWORD
nonn
AUTHOR
Artur Jasinski, Apr 11 2008
EXTENSIONS
Edited by M. F. Hasler, Apr 09 2009
STATUS
approved