Number of (n+2)X(n+2) 0..3 arrays with every 3X3 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.
A252184
Number of (n+2)X(n+2) 0..3 arrays with every 3X3 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) =945a(1) =1886a(2) =3705a(3) =9233a(4) =24956a(5) =57629a(6) =147696a(7) =488200a(8) =1339760a(9) =4201296a(10) =53487944a(11) =243810896a(12) =1121545296a(13) =82644345928a(14) =442293577808
External references
- oeis: A252184