OFFSET
1,1
COMMENTS
For further information see A002982, which is the main entry.
Also primes of the form 1*1! + 2*2! + ... + n*n!. - Jonathan Vos Post, Jul 21 2006
Prime numbers that are the difference of two factorial numbers. - Juri-Stepan Gerasimov, Nov 08 2010
LINKS
T. D. Noe, Table of n, a(n) for n=1..12
FORMULA
p = n!-1 for some n given in A002982.
MATHEMATICA
Select[Range[40]!-1, PrimeQ] (* Harvey P. Dale, Aug 16 2012 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Labos Elemer, Jun 28 2000
EXTENSIONS
Edited by Jon E. Schoenfield, Jan 09 2015
STATUS
approved