Number of (n+2) X (6+2) 0..3 arrays with every 3 X 3 subblock row and diagonal sum equal to 0, 2, 4, 6 or 7 and every 3 X 3 column and antidiagonal sum not equal to 0, 2, 4, 6 or 7.

A252431

Number of (n+2) X (6+2) 0..3 arrays with every 3 X 3 subblock row and diagonal sum equal to 0, 2, 4, 6 or 7 and every 3 X 3 column and antidiagonal sum not equal to 0, 2, 4, 6 or 7.

Terms

    a(0) =4342a(1) =6178a(2) =20632a(3) =74892a(4) =302218a(5) =1190037a(6) =4567070a(7) =18926855a(8) =75297774a(9) =295100889a(10) =1242624198a(11) =4990775266a(12) =19801640382a(13) =84145500595a(14) =339967116597

External references