Half the number of (n+1)X(n+1) symmetric 0..7 arrays with no 2X2 subblock summing to 14.
A213696
Half the number of (n+1)X(n+1) symmetric 0..7 arrays with no 2X2 subblock summing to 14.
Terms
- a(0) =240a(1) =105856a(2) =342943680
External references
- oeis: A213696