T(n,k)=Number of (n+1)X(k+1) 0..7 arrays with every 2X2 subblock having the absolute values of all six edge and diagonal differences no larger than 1.

A234421

T(n,k)=Number of (n+1)X(k+1) 0..7 arrays with every 2X2 subblock having the absolute values of all six edge and diagonal differences no larger than 1.

Terms

    a(0) =106a(1) =550a(2) =550a(3) =2848a(4) =5606a(5) =2848a(6) =14794a(7) =56768a(8) =56768a(9) =14794a(10) =76996a(11) =576798a(12) =1131708a(13) =576798a(14) =76996a(15) =401332a(16) =5868488a(17) =22692600a(18) =22692600a(19) =5868488a(20) =401332a(21) =2094334a(22) =59776664a(23) =455740110a(24) =902381482a(25) =455740110a(26) =59776664a(27) =2094334a(28) =10939294

External references