Number of (n+2)X(5+2) 0..3 arrays with every 3X3 subblock row and column sum not 3 or 6 and every diagonal and antidiagonal sum 3 or 6.
A251826
Number of (n+2)X(5+2) 0..3 arrays with every 3X3 subblock row and column sum not 3 or 6 and every diagonal and antidiagonal sum 3 or 6.
Terms
- a(0) =61058a(1) =284506a(2) =2395590a(3) =10655426a(4) =101716526a(5) =951770218a(6) =4235688278a(7) =41895955226a(8) =402976069458
External references
- oeis: A251826