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%I #5 Feb 25 2024 10:30:17
%S 1,2,1014,16058
%N Numbers k such that A362555(k) = (5^k + 5*k)/5 is prime.
%C If it exists, a(5) > 50000.
%o (PARI) is(n) = ispseudoprime(5^(n-1)+n)
%Y Cf. A104745, A362555, A370190.
%K nonn,hard,more
%O 1,2
%A _Hugo Pfoertner_, Feb 24 2024