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A199037
Number of nX4 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 one or two horizontal or vertical neighbors
1
0, 12, 127, 3916, 86544, 674064, 35902575, 750625102, 5442674205, 326415070048, 6891880687104, 50123775833686, 3107281380843015, 66459989877060602, 486615013344919101, 30688654869734908624, 662760542913624114980
OFFSET
1,2
COMMENTS
Column 4 of A199041
LINKS
EXAMPLE
Some solutions for n=5
..0..0..1..1....0..0..1..1....0..1..2..2....0..1..1..0....0..1..2..2
..2..0..1..0....2..2..1..1....0..1..0..1....0..2..2..0....0..1..1..1
..2..1..2..0....2..1..0..0....2..0..0..1....0..1..2..2....2..0..0..1
..1..1..2..0....2..1..2..0....2..1..2..2....0..1..1..1....2..1..1..2
..2..2..2..0....0..0..2..2....2..1..0..0....2..2..2..1....2..0..0..2
CROSSREFS
Sequence in context: A215774 A275941 A173359 * A099157 A239407 A360878
KEYWORD
nonn
AUTHOR
R. H. Hardin Nov 02 2011
STATUS
approved