Numbers k such that A176972(k) = 7^k + 7*k + 1 is prime.

A370664

Numbers k such that A176972(k) = 7^k + 7*k + 1 is prime.

Terms

    a(0) =0a(1) =5a(2) =11a(3) =1389a(4) =5351a(5) =6207a(6) =31173

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