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A209520
Number of n X n 0..7 arrays with every 2X2 subblock containing exactly one value repeat, and new values 0..7 introduced in row major order
0
1, 6, 2027, 27323948, 16484968944748, 258381047085271692456
OFFSET
1,2
COMMENTS
Diagonal of A209527
EXAMPLE
Some solutions for n=5
..0..0..0..0..0....0..0..0..0..0....0..0..0..1..0....0..0..0..0..1
..1..2..1..2..1....1..2..1..2..3....1..2..3..0..2....1..2..1..3..3
..2..3..2..0..0....1..3..3..1..2....0..0..2..0..1....2..0..0..0..1
..1..1..1..1..2....4..4..5..1..4....4..1..0..1..2....1..1..2..1..2
..0..2..0..2..0....5..6..6..5..1....1..2..0..2..0....0..2..0..0..0
CROSSREFS
Sequence in context: A053293 A209737 A209458 * A279440 A004817 A089535
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 10 2012
STATUS
approved