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A199518
Number of nX3 0..3 arrays with values 0..3 introduced in row major order, the number of instances of each value within one of each other, and every element equal to two or fewer horizontal or vertical neighbors
1
1, 45, 1260, 15400, 2513869, 174524175, 5866391058, 78538951349, 14918883751196, 1134907763429651, 40321453946092356, 558398606969183196, 113331120839472129952, 8998123036816556850222, 328615244611727182223731
OFFSET
1,2
COMMENTS
Column 3 of A199523
LINKS
EXAMPLE
Some solutions for n=3
..0..0..1....0..0..1....0..1..1....0..1..1....0..1..0....0..1..0....0..1..2
..2..2..3....2..1..2....2..3..0....2..3..3....1..2..3....2..1..2....3..0..3
..2..1..3....3..0..3....3..2..2....2..0..2....2..0..3....3..3..2....1..2..2
CROSSREFS
Sequence in context: A226981 A173000 A004350 * A075515 A330389 A346324
KEYWORD
nonn
AUTHOR
R. H. Hardin Nov 07 2011
STATUS
approved