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 or nw-to-se diagonally, and new values 0..1 introduced in row major order.

A205273

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 or nw-to-se diagonally, and new values 0..1 introduced in row major order.

Terms

    a(0) =223a(1) =1606a(2) =1606a(3) =11553a(4) =21537a(5) =11553a(6) =82991a(7) =288483a(8) =288483a(9) =82991a(10) =596414a(11) =3849194a(12) =7191926a(13) =3849194a(14) =596414a(15) =4285989a(16) =51416847a(17) =178174596a(18) =178174596a(19) =51416847a(20) =4285989a(21) =30799890a(22) =686818023a(23) =4422079769a(24) =8174802163a(25) =4422079769

External references