Numbers k such that 61*2^k + 1 is prime.

A032380

Numbers k such that 61*2^k + 1 is prime.

Terms

    a(0) =4a(1) =12a(2) =48a(3) =88a(4) =168a(5) =3328a(6) =172428a(7) =285652a(8) =4749928

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