T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with every 2X2 subblock having the absolute values of all six edge and diagonal differences no larger than 1.

A234122

T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with every 2X2 subblock having the absolute values of all six edge and diagonal differences no larger than 1.

Terms

    a(0) =31a(1) =145a(2) =145a(3) =673a(4) =1361a(5) =673a(6) =3127a(7) =12593a(8) =12593a(9) =3127a(10) =14527a(11) =116801a(12) =231713a(13) =116801a(14) =14527a(15) =67489a(16) =1082977a(17) =4279065a(18) =4279065a(19) =1082977a(20) =67489a(21) =313537a(22) =10041953a(23) =79003521a(24) =157630963a(25) =79003521a(26) =10041953a(27) =313537a(28) =1456615a(29) =93113761

External references