A199644 Number of nX5 0..2 arrays with values 0..2 introduced in row major order and each element equal to one or two horizontal and vertical neighbors.

3, 288, 12748, 658770, 32177372, 1614250077, 80053957248, 3988024796446, 198328767139736, 9869645990489747, 491026123739354858, 24431608808618462704, 1215575822472077464282, 60480991464785183388557

Offset: 1

Author

R. H. Hardin Nov 08 2011

Keywords

• nonn

Comments

Column 5 of A199647

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..177