Number of (n+1) X 4 0..2 arrays with every 2 X 2 subblock commuting with each of its horizontal and vertical 2 X 2 subblock neighbors.
A186466
Number of (n+1) X 4 0..2 arrays with every 2 X 2 subblock commuting with each of its horizontal and vertical 2 X 2 subblock neighbors.
Terms
- a(0) =277a(1) =243a(2) =942a(3) =1203a(4) =3190a(5) =4023a(6) =9982a(7) =13985a(8) =32390a(9) =48553a(10) =105436a(11) =165842a(12) =344498a(13) =562526a(14) =1130820a(15) =1898670a(16) =3724364a(17) =6385226a(18) =12298364a(19) =21417538a(20) =40692652a(21) =71701562a(22) =134848628a(23) =239701634a(24) =447381180a(25) =800490426a(26) =1485546884a(27) =2671168754
External references
- oeis: A186466