Numbers n such that (13^n - 4^n)/9 is prime.

A224691

Numbers n such that (13^n - 4^n)/9 is prime.

Terms

    a(0) =2a(1) =5a(2) =19a(3) =109a(4) =157a(5) =8521a(6) =26017a(7) =26177

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