OFFSET
1,1
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 1..200
Florian Luca and Igor E. Shparlinski, On the largest prime factor of n! + 2^n - 1, Journal de Theorie des Nombres de Bordeaux 17 (2005), 859-870.
MAPLE
MATHEMATICA
Table[n! + 2 n - 1, {n, 40}]
PROG
(PARI) a(n)=n!+2*n-1 \\ Charles R Greathouse IV, Feb 01 2013
(Magma) [Factorial(n)+2*n-1 : n in [1..20]]; // Wesley Ivan Hurt, Nov 15 2014
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Artur Jasinski, Apr 22 2008
STATUS
approved