Number of (n+2)X(1+2) 0..2 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum less than 3.
A252441
Number of (n+2)X(1+2) 0..2 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum less than 3.
Terms
- a(0) =339a(1) =1677a(2) =9062a(3) =48658a(4) =259257a(5) =1382414a(6) =7389034a(7) =39505162a(8) =211085078a(9) =1127932908a(10) =6027956200a(11) =32214103236a(12) =172151883337a(13) =919985137034
External references
- oeis: A252441