Numbers k such that (12^k - 5^k)/7 is prime.

A128348

Numbers k such that (12^k - 5^k)/7 is prime.

Terms

    a(0) =2a(1) =3a(2) =31a(3) =41a(4) =53a(5) =101a(6) =421a(7) =1259a(8) =4721a(9) =45259

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