a(n) = 5^(prime(n) - 1) + 5^prime(n) - 1.

A098117

a(n) = 5^(prime(n) - 1) + 5^prime(n) - 1.

Terms

    a(0) =29a(1) =149a(2) =3749a(3) =93749a(4) =58593749a(5) =1464843749a(6) =915527343749

External references