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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 October 14 09:25 EDT 2019. Contains 327995 sequences. (Running on oeis4.)