Number of (n+2) X (5+2) 0..3 arrays with every 3 X 3 subblock row and column sum not 1 3 6 or 8 and every diagonal and antidiagonal sum 1 3 6 or 8.

A252050

Number of (n+2) X (5+2) 0..3 arrays with every 3 X 3 subblock row and column sum not 1 3 6 or 8 and every diagonal and antidiagonal sum 1 3 6 or 8.

Terms

    a(0) =5192a(1) =6136a(2) =10114a(3) =16536a(4) =53346a(5) =112542a(6) =191804a(7) =603460a(8) =1370412a(9) =2559304a(10) =7987268a(11) =18723782a(12) =36790310a(13) =113723442a(14) =277684304a(15) =552076276a(16) =1727313092a(17) =4309244108a(18) =8715779900a(19) =27105702580a(20) =69652491786a(21) =140623057866a(22) =441367439678

External references