A209496 Number of n X n 0..4 arrays with every 2X2 subblock containing exactly one value repeat, and new values 0..4 introduced in row major order.

1, 6, 1938, 9502354, 416022303027, 154401817037192112, 485400266057664024464791

Offset: 1

Author

R. H. Hardin Mar 09 2012

Keywords

• nonn

Comments

Diagonal of A209503

Examples

			Some solutions for n=4
..0..0..1..0....0..1..0..0....0..0..0..1....0..1..0..2....0..0..0..0
..2..1..2..0....0..2..1..2....1..2..3..0....2..2..0..3....1..2..3..2
..1..3..1..2....2..1..0..0....2..3..1..3....0..1..2..0....2..3..0..3
..3..4..4..4....3..1..2..3....1..1..2..1....0..3..1..0....4..2..2..0