Number of nX4 0..7 arrays with every 2X2 subblock containing exactly one value repeat, and new values 0..7 introduced in row major order.
A209523
Number of nX4 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) =15a(1) =700a(2) =107693a(3) =27323948a(4) =9700576474
External references
- oeis: A209523