1/4 the number of (n+1)X4 0..3 arrays with every 2X2 subblock having distinct edge sums.
A209731
1/4 the number of (n+1)X4 0..3 arrays with every 2X2 subblock having distinct edge sums.
Terms
- a(0) =696a(1) =9712a(2) =137888a(3) =1995752a(4) =28927984a(5) =420545824a(6) =6111765608a(7) =88883321584
External references
- oeis: A209731