Numbers k such that (11^k - 5^k)/6 is prime.

A128347

Numbers k such that (11^k - 5^k)/6 is prime.

Terms

    a(0) =5a(1) =41a(2) =149a(3) =229a(4) =263a(5) =739a(6) =3457a(7) =20269a(8) =98221

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