Number of nX2 0..7 arrays with every 2X2 subblock containing exactly one value repeat, and new values 0..7 introduced in row major order.
A209521
Number of nX2 0..7 arrays with every 2X2 subblock containing exactly one value repeat, and new values 0..7 introduced in row major order.
Terms
- a(0) =2a(1) =6a(2) =57a(3) =700a(4) =10677a(5) =193676a(6) =4054358a(7) =95534880a(8) =2472405340a(9) =68613576496
External references
- oeis: A209521