T(n,n-3), array T as in A054098.

Terms

a(0) =1a(1) =14a(2) =30a(3) =148a(4) =744a(5) =4610a(6) =32870a(7) =266972a(8) =2431608a(9) =24554194a(10) =272289630a(11) =3289836260a(12) =43017800312a(13) =605289111698