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A186588 Number of (n+3)X11 0..2 arrays with every 4X4 subblock commuting with each horizontal and vertical neighbor 4X4 subblock 1
2604716, 104983, 160945, 342691, 645937, 841075, 895753, 1049539, 1237105, 1449115, 1727305, 2270035, 3454177, 4842475, 6443497, 8851603, 12917665, 18584859, 25233881, 34582531, 49615377, 70627083, 96804489, 133197363 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 8 of A186589

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..59

FORMULA

Empirical: a(n)=2*a(n-1)-a(n-2)+2*a(n-4)-4*a(n-5)+2*a(n-6)+2*a(n-8)-2*a(n-9) for n>18

EXAMPLE

Some solutions for 5X11

..0..0..0..0..0..0..0..0..0..2..1....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..0....0..0..0..0..0..0..0..0..0..0..1

..1..0..0..0..0..0..0..0..0..0..0....2..0..0..0..0..0..0..0..0..0..0

..2..0..1..0..0..0..0..0..0..0..0....0..1..0..0..0..0..0..0..0..0..0

CROSSREFS

Sequence in context: A317615 A250706 A269281 * A204882 A183660 A004674

Adjacent sequences:  A186585 A186586 A186587 * A186589 A186590 A186591

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 24 2011

STATUS

approved

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Last modified July 2 16:36 EDT 2022. Contains 355029 sequences. (Running on oeis4.)