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

A106047

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

Terms

    a(0) =2a(1) =3a(2) =5a(3) =19a(4) =307a(5) =17581a(6) =2676893a(7) =864233833

External references