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Numbers k such that the sum of the first k Mersenne prime exponents is prime.
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%I #19 Feb 24 2024 11:07:27

%S 1,2,4,6,8,14,18,46,48

%N Numbers k such that the sum of the first k Mersenne prime exponents is prime.

%Y Cf. A000043.

%K nonn,less,more

%O 1,2

%A _G. L. Honaker, Jr._

%E a(8)-a(9) from _Max Alekseyev_, Feb 23 2024