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A209458
Number of n X n 0..6 arrays with every 2X2 subblock containing exactly one value repeat, and new values 0..6 introduced in row major order
0
1, 6, 2027, 26142922, 9920302864598, 61881181615562063430
OFFSET
1,2
COMMENTS
Diagonal of A209465
EXAMPLE
Some.solutions.for.n=4
..0..0..1..0....0..0..1..0....0..1..0..0....0..0..1..0....0..0..0..0
..1..2..0..2....1..2..0..3....0..2..1..2....1..2..0..2....1..2..1..2
..3..2..1..1....0..0..1..0....0..1..3..1....1..3..3..0....0..2..3..1
..0..2..3..4....1..2..0..2....0..2..2..2....0..0..1..0....0..1..1..4
CROSSREFS
Sequence in context: A094036 A053293 A209737 * A209520 A279440 A004817
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 09 2012
STATUS
approved