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A289947
Values of n for which Sum_{k=1..n} k!^6 is prime.
3
OFFSET
1,1
COMMENTS
A289946(n) is divisible by 1091 for n >= 1090, and checking the terms below that gives A289946(a(3)) = A289946(102) as the final prime in the sequence.
LINKS
Eric Weisstein's World of Mathematics, Factorial Sums
Eric Weisstein's World of Mathematics, Integer Sequence Primes
EXAMPLE
A289946(5) = 2986175149697 is prime.
PROG
(PARI) isok(n) = isprime(sum(k=1, n, k!^6)); \\ Michel Marcus, Jul 17 2017
CROSSREFS
Cf. A289946 (Sum_{k=1..n} k!^6).
Cf. A100289 (k!^2), A290014 (k!^10).
Sequence in context: A223137 A068560 A039773 * A272955 A317297 A135973
KEYWORD
nonn,bref,full,fini
AUTHOR
Eric W. Weisstein, Jul 16 2017
STATUS
approved