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

A252134

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

Terms

    a(0) =209a(1) =431a(2) =1535a(3) =5233a(4) =18047a(5) =62277a(6) =213689a(7) =735011a(8) =2535415a(9) =8731891a(10) =30044153a(11) =103433117a(12) =356211269a(13) =1226555379a(14) =4222869347a(15) =14539251441a(16) =50061141877a(17) =172368825649a(18) =593481175735

External references