
COMMENTS

Or, numbers n such that Sum_{dn} d! is prime.
The prime 26951 from A002981 (n!+1 is prime) is a member since Sum_{dn} d! = n!+1 if n is prime.  Jonathan Sondow, Jan 30 2005
a(n) are the primes in A002981[n] = {0, 1, 2, 3, 11, 27, 37, 41, 73, 77, 116, 154, 320, 340, 399, 427, 872, 1477, 6380, 26951, ...} Numbers n such that n! + 1 is prime. Corresponding primes of the form p! + 1 are listed in A103319[n] = {3, 7, 39916801, 13763753091226345046315979581580902400000001, 33452526613163807108170062053440751665152000000001, ...}.  Alexander Adamchuk, Sep 23 2006


LINKS

Table of n, a(n) for n=1..8.
Chris K. Caldwell, The List of Largest Known Primes, 110059! + 1
R. Mestrovic, Euclid's theorem on the infinitude of primes: a historical survey of its proofs (300 BC2012) and another new proof, arXiv:1202.3670 [math.HO], 2012.  From N. J. A. Sloane, Jun 13 2012
Apoloniusz Tyszka, A common approach to the problem of the infinitude of twin primes, primes of the form n! + 1, and primes of the form n!  1, 2018.
Apoloniusz Tyszka, A new approach to solving number theoretic problems, 2018.
