a(n) = 2^(4*n + 3) + 2*4^n + 3.

A195464

a(n) = 2^(4*n + 3) + 2*4^n + 3.

Terms

    a(0) =13a(1) =139a(2) =2083a(3) =32899a(4) =524803a(5) =8390659a(6) =134225923a(7) =2147516419a(8) =34359869443a(9) =549756338179

External references