%I #18 Jun 30 2024 06:38:07
%S 1,2,37,451,1699,2131,12612
%N Numbers k such that k^k + k + 5 is prime.
%C Here we interpret 0^0 as 1.
%C a(7) > 10^4. [From _D. S. McNeil_, Mar 14 2009]
%C a(8) > 2*10^4. - _Michael S. Branicky_, Jun 30 2024
%o (PARI) f2(n) = for(x=0,n,y=x^x+x+5;if(ispseudoprime(y),print1(x", ")))
%Y Cf. A100848, A100850.
%K hard,more,nonn
%O 1,2
%A _Cino Hilliard_, Jan 07 2005
%E a(5)-a(6) from _D. S. McNeil_, Mar 14 2009
%E a(7) from _Michael S. Branicky_, Jun 29 2024