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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 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 8 of A188105

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..200

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

Adjacent sequences:  A188101 A188102 A188103 * A188105 A188106 A188107

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 20 2011

STATUS

approved

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Last modified January 19 21:35 EST 2018. Contains 297938 sequences.