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A185836 Number of (n+1)X(n+1) 0..2 arrays with every 2X2 subblock trace equal to some horizontal or vertical neighbor 2X2 subblock trace 0
0, 1773, 424197, 560733777, 3293066139075, 91469611366917651 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Diagonal of A185845
LINKS
EXAMPLE
Some solutions for 3X3
..0..1..0....1..2..2....0..0..2....0..2..2....2..0..1....0..0..1....1..0..2
..2..1..0....0..0..0....0..1..1....0..1..0....0..0..1....0..1..2....2..1..2
..1..0..1....1..1..2....2..1..0....1..1..1....1..2..1....2..1..1....2..1..2
CROSSREFS
Sequence in context: A155023 A176478 A187132 * A047826 A143995 A205938
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 05 2011
STATUS
approved

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Last modified March 28 07:18 EDT 2024. Contains 371235 sequences. (Running on oeis4.)