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A187931
Number of (n+2)X(n+2) binary arrays with every 2X2 subblock sum equal to some diagonal or antidiagonal neighbor 2X2 subblock sum
0
48, 104, 7616, 544222, 167909728
(list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Diagonal of A187940
LINKS
Table of n, a(n) for n=1..5.
EXAMPLE
Some solutions for 4X4
..0..1..0..0....1..1..0..1....0..1..0..0....1..1..1..1....1..0..1..1
..1..0..1..1....0..0..0..1....1..0..1..1....0..1..0..1....0..1..0..0
..0..1..0..0....0..1..1..1....0..1..0..1....1..1..1..1....1..0..1..1
..1..0..1..1....0..1..0..0....0..1..1..0....1..0..1..0....0..1..0..0
CROSSREFS
Sequence in context: A113797 A260294 A260287 * A191837 A044235 A044616
Adjacent sequences: A187928 A187929 A187930 * A187932 A187933 A187934
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 16 2011
STATUS
approved

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Last modified March 10 02:43 EDT 2025. Contains 381607 sequences.
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