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A186612
Number of (n+5) X 7 binary arrays with every 6 X 6 subblock commuting with each horizontal and vertical neighbor 6 X 6 subblock.
1
78654, 3201, 5072, 25852, 137138, 451621, 955892, 1448220, 1759720, 1877180, 1901280, 1907684, 1913192, 1918708, 1924488, 1935913, 1995810, 2261835, 3001848, 4341477, 6086182, 7974728, 9935846, 12109496, 14762642, 18020920, 21690054
OFFSET
1,1
COMMENTS
Column 2 of A186619.
LINKS
FORMULA
Empirical: a(n) = a(n-1)+a(n-4)-a(n-5)+a(n-6)-a(n-7)-a(n-10)+a(n-11)+a(n-12)-a(n-16) for n>25.
EXAMPLE
Some solutions for 9 X 7
..0..0..0..0..1..0..0....0..0..0..0..0..1..0....1..0..0..0..0..0..0
..0..0..0..0..0..0..0....0..0..0..1..0..0..1....0..0..0..0..0..0..0
..0..0..0..0..0..0..0....0..0..0..0..0..0..0....0..0..0..0..0..0..0
..0..0..0..0..0..0..0....0..0..0..0..0..0..0....0..0..0..0..0..0..0
..0..0..0..0..0..0..0....0..0..0..0..0..0..0....0..0..0..0..0..0..0
..0..0..0..0..0..0..0....0..0..0..0..0..0..0....0..0..0..0..0..0..0
..0..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..1..0..1..0..0..0
..0..1..1..1..0..0..0....1..1..1..0..1..0..0....0..0..0..0..0..0..0
CROSSREFS
Cf. A186619.
Sequence in context: A368560 A123159 A184230 * A180973 A264950 A204570
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 24 2011
STATUS
approved