T(n,n-3), array T as in A038792.

Terms

a(0) =1a(1) =4a(2) =8a(3) =13a(4) =21a(5) =33a(6) =50a(7) =73a(8) =103a(9) =141a(10) =188a(11) =245a(12) =313a(13) =393a(14) =486a(15) =593a(16) =715a(17) =853a(18) =1008a(19) =1181a(20) =1373a(21) =1585a(22) =1818a(23) =2073a(24) =2351a(25) =2653a(26) =2980a(27) =3333a(28) =3713a(29) =4121