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A198251
Number of 2nX12 0..4 arrays with values 0..4 introduced in row major order and each element equal to exactly two horizontal and vertical neighbors
0
51, 90641, 203087097, 468268681671, 1088857594220452
OFFSET
1,1
COMMENTS
Column 6 of A198253
EXAMPLE
Some solutions for n=3
..0..0..0..0..0..0..0..0..0..0..1..1....0..0..0..0..0..0..1..1..0..0..1..1
..0..2..2..3..3..4..4..1..1..0..1..1....0..2..2..3..3..0..1..1..0..0..1..1
..0..2..2..3..3..4..4..1..1..0..0..0....0..2..2..3..3..0..3..3..1..1..2..2
..0..4..4..0..0..0..0..0..0..4..4..0....0..0..0..0..0..0..3..3..1..1..2..2
..0..4..4..0..1..1..4..4..0..4..4..0....2..2..4..4..3..3..1..1..2..2..0..0
..0..0..0..0..1..1..4..4..0..0..0..0....2..2..4..4..3..3..1..1..2..2..0..0
CROSSREFS
Sequence in context: A208412 A198904 A238567 * A135531 A038777 A281979
KEYWORD
nonn
AUTHOR
R. H. Hardin Oct 22 2011
STATUS
approved