For n >= 2, a(n) = prime[prime[a(n-1)] - a(n-1)]; a(1)=5.

A106046

For n >= 2, a(n) = prime[prime[a(n-1)] - a(n-1)]; a(1)=5.

Terms

    a(0) =5a(1) =13a(2) =107a(3) =3413a(4) =328891a(5) =74554429a(6) =32944178077

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