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

A252188

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

Terms

    a(0) =3341a(1) =3996a(2) =5460a(3) =9233a(4) =14130a(5) =21417a(6) =34532a(7) =55336a(8) =84332a(9) =135776a(10) =218896a(11) =334872a(12) =539664a(13) =871440a(14) =1334792a(15) =2152016a(16) =3477712a(17) =5329992a(18) =8595024a(19) =13894992a(20) =21301832a(21) =34354256a(22) =55548496a(23) =85171272a(24) =137365584a(25) =222131280a(26) =340613192a(27) =549359696a(28) =888399952a(29) =1362309192

External references