Number of (n+1)X(n+1) 0..6 arrays with every 2X2 subblock commuting with each of its horizontal and vertical 2X2 subblock neighbors.
A186487
Number of (n+1)X(n+1) 0..6 arrays with every 2X2 subblock commuting with each of its horizontal and vertical 2X2 subblock neighbors.
Terms
- a(0) =2401a(1) =2923a(2) =122034a(3) =464292a(4) =7513081a(5) =24490909a(6) =378414577a(7) =1358113549a(8) =19707528913a(9) =75371432509
External references
- oeis: A186487