A063106 Primes of form !n + 2n - 1.

2, 5, 17, 43, 887, 522956339, 20935051082417771847631371547939998232420940393

Offset

1,1

Links

Table of n, a(n) for n=1..7.

Prog

(PARI) for(n=1, 50, x=sum(k=0, n-1, k!)+(2*n-1); if(isprime(x), print(x)))

Crossrefs

Cf. A003422.

Sequence in context: A076076 A136194 A056304 * A096295 A215580 A275210

Adjacent sequences: A063103 A063104 A063105 * A063107 A063108 A063109

Keyword

nonn

Author

Jason Earls, Aug 08 2001

Status

approved