Numbers k such that (k*3^k - 1)/2 is a prime.

A366323

Numbers k such that (k*3^k - 1)/2 is a prime.

Terms

    a(0) =5a(1) =25a(2) =125a(3) =389a(4) =549a(5) =1125a(6) =12889a(7) =26925

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