T(n,n-2), array T as in A054098.

Terms

a(0) =1a(1) =6a(2) =8a(3) =36a(4) =142a(5) =750a(6) =4604a(7) =32876a(8) =266966a(9) =2431614a(10) =24554188a(11) =272289636a(12) =3289836254a(13) =43017800318a(14) =605289111692