Double factorial primes; values k for which k!! + 1 is prime.
A080778
Double factorial primes; values k for which k!! + 1 is prime.
Terms
- a(0) =0a(1) =1a(2) =2a(3) =518a(4) =33416a(5) =37310a(6) =52608a(7) =123998a(8) =220502
External references
- oeis: A080778