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A199223
Number of nX1 0..2 arrays with values 0..2 introduced in row major order, the number of instances of each value within one of each other, and every element equal to zero or one horizontal or vertical neighbors
1
1, 1, 1, 6, 15, 15, 90, 226, 219, 1436, 3671, 3514, 24039, 62130, 58962, 415608, 1082718, 1021368, 7354732, 19274263, 18101068, 132456534, 348731568, 326374830, 2418406938, 6390767156, 5964605638, 44643259798, 118329627186, 110190867844
OFFSET
1,4
COMMENTS
Column 1 of A199230
LINKS
EXAMPLE
Some solutions for n=6
..0....0....0....0....0....0....0....0....0....0....0....0....0....0....0
..1....1....1....0....1....1....1....1....0....1....1....0....1....1....1
..2....2....0....1....0....1....1....2....1....0....2....1....1....2....2
..1....0....1....2....2....2....2....0....1....2....2....2....0....1....2
..2....1....2....2....1....0....2....2....2....2....0....1....2....0....1
..0....2....2....1....2....2....0....1....2....1....1....2....2....2....0
CROSSREFS
Sequence in context: A201142 A200902 A205132 * A199094 A009579 A358760
KEYWORD
nonn
AUTHOR
R. H. Hardin Nov 04 2011
STATUS
approved