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A186164
1/4 the number of nX5 0..3 arrays with every element equal to exactly one or two of its horizontal and vertical neighbors
1
7, 2175, 253341, 37402872, 5033988714, 704281652979, 96951738076992, 13435825601048421, 1856827788245959473, 256908205340960558187, 35528479510856892673200, 4914300705034627821533085
OFFSET
1,1
COMMENTS
Column 5 of A186168
LINKS
EXAMPLE
Some solutions for 4X5 with a(1,1)=0
..0..0..0..1..1....0..0..0..0..0....0..0..0..3..3....0..0..0..2..2
..0..2..0..1..2....0..2..1..1..1....0..2..0..1..3....0..2..0..2..1
..1..2..2..1..2....0..2..2..3..3....0..2..2..1..1....0..2..0..3..1
..1..1..0..0..2....3..3..3..0..0....0..3..3..0..0....0..2..0..3..3
CROSSREFS
Sequence in context: A125538 A373035 A129732 * A203686 A248142 A216472
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 13 2011
STATUS
approved