Primes p such that (2p)!! - 1 is prime.

A122719

Primes p such that (2p)!! - 1 is prime.

Terms

    a(0) =2a(1) =3a(2) =13a(3) =41a(4) =59a(5) =97a(6) =107a(7) =421a(8) =1663a(9) =22159

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