OFFSET
1,1
COMMENTS
a(2) = 3628789 through a(4), a 730-digit number, have been certified prime with Primo.
EXAMPLE
a(1) = 4! - 4 - 1 = 19, a prime, so 19 is in this sequence (4 = A073443(1)).
PROG
(PARI) for(n=3, 2000, p=n!-n-1; if(isprime(p), print1(p, ", ")))
CROSSREFS
KEYWORD
nonn
AUTHOR
Rick L. Shepherd, Jul 31 2002
STATUS
approved