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A187960 Half the number of (n+2)X7 binary arrays with no 3X3 subblock having a sum equal to any horizontal or vertical neighbor 3X3 subblock sum 0
240064, 2092928, 16890700, 124421880, 1218772461, 11568061339, 98476432408, 907622916436 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 5 of A187964
LINKS
EXAMPLE
Some solutions for 4X7 with a(1,1)=0
..0..0..1..1..1..1..1....0..0..0..1..0..0..0....0..0..1..0..1..1..0
..0..0..0..1..0..1..1....0..0..0..1..1..1..0....0..0..0..0..0..1..0
..0..0..0..1..0..1..0....0..0..0..1..0..1..1....0..0..0..1..1..1..0
..0..0..0..0..1..0..0....0..0..1..1..1..0..0....0..0..0..0..0..1..0
CROSSREFS
Sequence in context: A234547 A234709 A015345 * A190388 A249194 A281887
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 16 2011
STATUS
approved

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Last modified March 28 08:12 EDT 2024. Contains 371236 sequences. (Running on oeis4.)