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A118222
Numbers k such that k! * prime(k)# + 1 is prime.
1
0, 1, 2, 3, 48, 151, 312, 445, 4343, 6765
OFFSET
1,3
COMMENTS
a(2)-a(8) found and primes proved by PrimeForm ([N-1, Brillhart-Lehmer-Selfridge]).
EXAMPLE
3 is a term as 3! * prime(3)# + 1 = 3*2*1 * 5*3*2 + 1 = 181, a prime.
CROSSREFS
Sequence in context: A163488 A215536 A173355 * A191594 A208204 A067092
KEYWORD
nonn,more
AUTHOR
Rick L. Shepherd, Apr 15 2006
EXTENSIONS
a(9) from Michael S. Branicky, Dec 13 2023
a(1)=0 inserted and a(10) from Michael S. Branicky, Sep 09 2024
STATUS
approved