Number of (n+2)X(6+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 0 3 4 6 or 7 and every 3X3 column and antidiagonal sum not equal to 0 3 4 6 or 7.
A252638
Number of (n+2)X(6+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 0 3 4 6 or 7 and every 3X3 column and antidiagonal sum not equal to 0 3 4 6 or 7.
Terms
- a(0) =13038a(1) =56953a(2) =355574a(3) =1848350a(4) =14252070a(5) =101563107a(6) =625096361a(7) =5008257261a(8) =37697432955a(9) =249652077490
External references
- oeis: A252638