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

A252452

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

Terms

    a(0) =323a(1) =959a(2) =3366a(3) =11334a(4) =38966a(5) =134907a(6) =464384a(7) =1603397a(8) =5553753a(9) =19211480a(10) =66422368a(11) =229808142a(12) =795271777a(13) =2751760322a(14) =9521215485a(15) =32945797509a(16) =114006440916a(17) =394517543590

External references