Number of (n+2)X(n+2) 0..3 arrays with every 3X3 subblock row and column sum equal to 0 3 5 6 or 7 and every 3X3 diagonal and antidiagonal sum not equal to 0 3 5 6 or 7.
A252140
Number of (n+2)X(n+2) 0..3 arrays with every 3X3 subblock row and column sum equal to 0 3 5 6 or 7 and every 3X3 diagonal and antidiagonal sum not equal to 0 3 5 6 or 7.
Terms
- a(0) =1921a(1) =2543a(2) =5440a(3) =5860a(4) =18757a(5) =24112a(6) =108750a(7) =114221a(8) =618938a(9) =567920a(10) =3884323a(11) =2961964a(12) =24519726a(13) =15344171a(14) =161408146a(15) =82783132
External references
- oeis: A252140