T(n,k)=Number of (n+2)X(k+2) 0..1 arrays with every 3X3 subblock having three equal elements in a row horizontally, vertically, diagonally or antidiagonally exactly two different ways, and new values 0..1 introduced in row major order.

A204867

T(n,k)=Number of (n+2)X(k+2) 0..1 arrays with every 3X3 subblock having three equal elements in a row horizontally, vertically, diagonally or antidiagonally exactly two different ways, and new values 0..1 introduced in row major order.

Terms

    a(0) =102a(1) =382a(2) =382a(3) =1437a(4) =1648a(5) =1437a(6) =5352a(7) =7127a(8) =7127a(9) =5352a(10) =20113a(11) =31034a(12) =36865a(13) =31034a(14) =20113a(15) =75595a(16) =136899a(17) =192080a(18) =192080a(19) =136899a(20) =75595a(21) =283877a(22) =603605a(23) =1013668a(24) =1193734a(25) =1013668a(26) =603605a(27) =283877a(28) =1066520a(29) =2660367

External references