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A186567
Number of (n+2)X10 0..2 arrays with every 3X3 subblock commuting with each horizontal and vertical neighbor 3X3 subblock
1
35198, 4795, 8029, 18415, 33445, 44887, 60973, 82783, 112357, 168727, 255085, 381007, 587317, 891271, 1333501, 2082015, 3198533, 4843447, 7513549, 11527567, 17482837, 26985511, 41409053, 63004927, 97035813, 148936471, 227092333
OFFSET
1,1
COMMENTS
Column 8 of A186568
LINKS
FORMULA
Empirical: a(n)=2*a(n-1)-a(n-2)+2*a(n-3)-4*a(n-4)+2*a(n-5)+2*a(n-6)-2*a(n-7) for n>16
EXAMPLE
Some solutions for 4X10
..0..0..2..0..0..0..0..0..0..2....1..0..0..1..0..0..2..0..0..1
..0..0..0..2..0..0..0..0..0..1....0..1..0..0..1..0..0..2..0..0
..0..0..0..0..2..0..0..0..0..0....0..0..1..0..0..1..0..0..2..0
..0..0..0..0..0..2..0..0..0..0....2..0..0..1..0..0..1..0..0..2
CROSSREFS
Sequence in context: A204491 A085545 A031855 * A235279 A358856 A133282
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 23 2011
STATUS
approved