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

Terms

a(0) =1a(1) =2a(2) =2a(3) =4a(4) =10a(5) =34a(6) =144a(7) =748a(8) =4606a(9) =32874a(10) =266968a(11) =2431612a(12) =24554190a(13) =272289634a(14) =3289836256a(15) =43017800316a(16) =605289111694