Number of (n+2)X(n+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 1 2 4 6 or 7 and every 3X3 column and antidiagonal sum not equal to 1 2 4 6 or 7.

A252550

Number of (n+2)X(n+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 1 2 4 6 or 7 and every 3X3 column and antidiagonal sum not equal to 1 2 4 6 or 7.

Terms

    a(0) =771a(1) =889a(2) =4006a(3) =24336a(4) =474384a(5) =11035929a(6) =145399017a(7) =11588408619a(8) =935064459875

External references