a(n) = (2*n-2)*(2*n-3)*a(n-1)+1.

A051396

a(n) = (2*n-2)*(2*n-3)*a(n-1)+1.

Terms

    a(0) =0a(1) =1a(2) =3a(3) =37a(4) =1111a(5) =62217a(6) =5599531a(7) =739138093a(8) =134523132927

External references