Numbers k such that (20^k - 1)^2 - 2 is prime.

A364080

Numbers k such that (20^k - 1)^2 - 2 is prime.

Terms

    a(0) =1a(1) =2a(2) =53a(3) =183a(4) =1281a(5) =1300a(6) =8041a(7) =29936a(8) =72820

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