T(n,k) is the number of (n+1) X (k+1) 0..1 matrices with each 2 X 2 permanent equal.

Terms

a(0) =16a(1) =38a(2) =38a(3) =89a(4) =152a(5) =89a(6) =218a(7) =565a(8) =565a(9) =218a(10) =538a(11) =2326a(12) =2961a(13) =2326a(14) =538a(15) =1349a(16) =9554a(17) =18257a(18) =18257a(19) =9554a(20) =1349a(21) =3410a(22) =40297a(23) =107665a(24) =180546a(25) =107665a(26) =40297a(27) =3410a(28) =8690a(29) =170754