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%I
%S 0,1,2,3,5,6,10,11,51,63,197,313,579
%N Numbers n such that 4*n! - 1 is prime.
%C Remaining terms are greater than 1000.
%e n=5 is here because 4*5!-1=479 is prime.
%p for n from 0 to 1000 do if isprime(4*n! - 1) then print(n) end if end do;
%Y Cf. A076680.
%K nonn
%O 1,3
%A _Brian Kell_, Oct 12 2004
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