T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with the upper median of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one.

A237974

T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with the upper median of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one.

Terms

    a(0) =256a(1) =1494a(2) =1494a(3) =7905a(4) =10014a(5) =7905a(6) =40442a(7) =59014a(8) =59014a(9) =40442a(10) =208210a(11) =357672a(12) =369068a(13) =357672a(14) =208210a(15) =1074202a(16) =2270776a(17) =2609908a(18) =2609908a(19) =2270776a(20) =1074202a(21) =5540337a(22) =14222512a(23) =20123780a(24) =25087700a(25) =20123780a(26) =14222512a(27) =5540337a(28) =28475040

External references