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%I #5 Dec 15 2017 17:35:19
%S 2,5,17,43,887,522956339,
%T 20935051082417771847631371547939998232420940393
%N Primes of form !n + 2n - 1.
%o (PARI) for(n=1,50,x=sum(k=0,n-1,k!)+(2*n-1); if(isprime(x),print(x)))
%Y Cf. A003422.
%K nonn
%O 1,1
%A _Jason Earls_, Aug 08 2001