Derived from the central terms (A127134) of triangle A127126; a(n) = A127126(2n,n)/(n+1).

A127135

Derived from the central terms (A127134) of triangle A127126; a(n) = A127126(2n,n)/(n+1).

Terms

    a(0) =1a(1) =1a(2) =6a(3) =71a(4) =1336a(5) =35233a(6) =1205605a(7) =50905881a(8) =2561801682a(9) =149816972193

External references