a(n) = a(n-1)*2^n + 1 where a(0)=1.

A073587

a(n) = a(n-1)*2^n + 1 where a(0)=1.

Terms

    a(0) =1a(1) =3a(2) =13a(3) =105a(4) =1681a(5) =53793a(6) =3442753a(7) =440672385a(8) =112812130561

External references