T(n,k)=Number of (n+2)X(k+2) 0..1 arrays with every 3X3 subblock having equal diagonal elements or equal antidiagonal elements, and new values 0..1 introduced in row major order.

A203923

T(n,k)=Number of (n+2)X(k+2) 0..1 arrays with every 3X3 subblock having equal diagonal elements or equal antidiagonal elements, and new values 0..1 introduced in row major order.

Terms

    a(0) =112a(1) =392a(2) =392a(3) =1400a(4) =1682a(5) =1400a(6) =5000a(7) =6050a(8) =6050a(9) =5000a(10) =17800a(11) =21632a(12) =21470a(13) =21632a(14) =17800a(15) =63368a(16) =77618a(17) =75272a(18) =75272a(19) =77618a(20) =63368a(21) =225704a(22) =279752a(23) =267066a(24) =262088a(25) =267066a(26) =279752a(27) =225704a(28) =803912a(29) =1008200

External references