a(n) = n-th prime arising A144717.

Terms

a(0) =3a(1) =5a(2) =13a(3) =61a(4) =421a(5) =3361a(6) =30241a(7) =332641a(8) =3991681a(9) =55883521a(10) =950019841a(11) =19000396801a(12) =456009523201