(3^p+p)/(p+1) with (p + 1) odd prime > 3.

A121823

(3^p+p)/(p+1) with (p + 1) odd prime > 3.

Terms

    a(0) =17a(1) =105a(2) =5369a(3) =40881a(4) =2532161a(5) =20390553a(6) =1364393897a(7) =788854912241

External references