Numbers k such that 7*8^k - 1 is prime.

A268061

Numbers k such that 7*8^k - 1 is prime.

Terms

    a(0) =3a(1) =7a(2) =15a(3) =59a(4) =6127a(5) =8703a(6) =11619a(7) =23403a(8) =124299

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