a(n) = 2*det(M(n; -1))/det(M(n; 0)), where M(n; m) is the n X n matrix with (i,j)-th element equal to 1/binomial(n + i + j + m, n).

A007226

a(n) = 2*det(M(n; -1))/det(M(n; 0)), where M(n; m) is the n X n matrix with (i,j)-th element equal to 1/binomial(n + i + j + m, n).

Terms

    a(0) =2a(1) =3a(2) =10a(3) =42a(4) =198a(5) =1001a(6) =5304a(7) =29070a(8) =163438a(9) =937365a(10) =5462730a(11) =32256120a(12) =192565800a(13) =1160346492a(14) =7048030544a(15) =43108428198a(16) =265276342782

External references