T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with every 2X2 subblock commuting with each of its horizontal and vertical 2X2 subblock neighbors.

A186472

T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with every 2X2 subblock commuting with each of its horizontal and vertical 2X2 subblock neighbors.

Terms

    a(0) =81a(1) =83a(2) =83a(3) =277a(4) =129a(5) =277a(6) =367a(7) =243a(8) =243a(9) =367a(10) =966a(11) =562a(12) =942a(13) =562a(14) =966a(15) =1321a(16) =903a(17) =1203a(18) =1203a(19) =903a(20) =1321a(21) =3078a(22) =1754a(23) =3190a(24) =3186a(25) =3190a(26) =1754a(27) =3078a(28) =4553a(29) =2937

External references