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A199522
Number of nX7 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
0
105, 1030230, 5866391058, 14045226977086, 506637005741617919
OFFSET
1,1
COMMENTS
Column 7 of A199523
EXAMPLE
Some solutions for n=3
..0..1..1..2..2..3..3....0..0..1..2..3..3..2....0..0..1..2..2..3..2
..0..1..0..3..3..2..2....0..1..0..1..3..2..2....0..1..0..3..1..3..2
..0..0..0..3..1..1..2....0..0..3..1..1..2..3....0..0..1..3..1..3..2
CROSSREFS
Sequence in context: A096150 A068256 A062031 * A036201 A286287 A050810
KEYWORD
nonn
AUTHOR
R. H. Hardin Nov 07 2011
STATUS
approved