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A188104
Number of (n+3)X11 binary arrays with every 4X4 subblock commuting with each horizontal and vertical neighbor 4X4 subblock
1
20888, 3110, 4285, 6253, 9265, 11245, 12477, 14853, 17589, 20717, 24669, 30593, 40709, 52461, 66065, 83805, 108473, 140714, 178759, 226864, 292013, 376487, 480369, 612051, 785445, 1010405, 1292818, 1651136, 2116315, 2717534, 3480088
OFFSET
1,1
COMMENTS
Column 8 of A188105
LINKS
FORMULA
Empirical: a(n)=2*a(n-1)-a(n-2)+a(n-4)-2*a(n-5)+a(n-6)+a(n-8)-a(n-9) for n>18
EXAMPLE
Some solutions for 5X11
..0..0..0..0..0..0..0..0..0..0..0....0..0..0..0..0..0..0..0..0..0..1
..0..0..0..0..0..0..0..0..0..0..0....0..0..0..0..0..0..0..0..0..1..1
..1..0..0..0..0..0..0..0..0..0..0....0..0..0..0..0..0..0..0..0..0..0
..1..0..0..0..0..0..0..0..0..0..0....0..1..0..0..0..0..0..0..0..0..0
..0..1..0..0..0..0..0..0..0..0..0....0..1..0..0..0..0..0..0..0..0..0
CROSSREFS
Sequence in context: A256840 A031813 A043654 * A278903 A233649 A262668
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 20 2011
STATUS
approved