T(n,k)=Number of (n+2)X(k+2) 0..6 arrays with every 3X3 subblock commuting with each horizontal and vertical neighbor 3X3 subblock.

A186572

T(n,k)=Number of (n+2)X(k+2) 0..6 arrays with every 3X3 subblock commuting with each horizontal and vertical neighbor 3X3 subblock.

Terms

    a(0) =40353607a(1) =24447a(2) =24447a(3) =864668a(4) =2295a(5) =864668a(6) =2116995a(7) =9909a(8) =9909a(9) =2116995a(10) =7582959a(11) =158223a(12) =155811a(13) =158223a(14) =7582959a(15) =14535672a(16) =386067a(17) =622551a(18) =622551a(19) =386067a(20) =14535672a(21) =22101528a(22) =506815a(23) =915667a(24) =6144163a(25) =915667a(26) =506815a(27) =22101528

External references