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A199231
Number of nX2 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 at least one horizontal or vertical neighbor
1
0, 0, 3, 12, 31, 143, 1183, 5068, 11594, 133430, 632580, 1198596, 16002429, 78638190, 139661368, 1990115356, 9953302579, 17313999205, 254272220438, 1284820132294, 2223104240738, 33166493583372, 168734504757571, 291907971810015
OFFSET
1,3
COMMENTS
Column 2 of A199237
LINKS
EXAMPLE
Some solutions for n=4
..0..0....0..1....0..1....0..1....0..0....0..0....0..0....0..0....0..0....0..0
..0..1....0..1....0..1....0..1....1..0....1..1....0..1....1..2....1..0....0..1
..1..1....0..1....0..2....2..1....1..2....2..1....2..1....1..2....1..1....2..1
..2..2....2..2....2..2....2..2....1..2....2..2....2..1....1..2....2..2....2..2
CROSSREFS
Sequence in context: A131740 A037237 A005718 * A098500 A037236 A309693
KEYWORD
nonn
AUTHOR
R. H. Hardin Nov 04 2011
STATUS
approved