OFFSET
1,1
COMMENTS
Primes which are within 1 of a superduperfactorial number.
Supersequence of A193430.
FORMULA
a(n) are the prime values of 1! * (1! * 2!) * (1! * 2! * 3!) * (1! * 2! * 3! * n!) +/- 1.
PROG
(PARI) t=1; p=1; for(n=1, 6, t*=n!; p*=t; if(isprime(p-1), print1(p-1, ", ")); if(isprime(p+1), print1(p+1, ", ")));
CROSSREFS
KEYWORD
nonn,hard
AUTHOR
Arkadiusz Wesolowski, Feb 21 2014
STATUS
approved