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A187938 Number of (n+2)X9 binary arrays with every 2X2 subblock sum equal to some diagonal or antidiagonal neighbor 2X2 subblock sum 0
38020, 328116, 27734942, 1239704056, 75359054474 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 7 of A187940

LINKS

Table of n, a(n) for n=1..5.

EXAMPLE

Some solutions for 4X9

..0..1..0..0..1..1..1..0..0....0..1..0..1..0..0..0..1..0

..0..1..1..1..1..0..0..1..0....0..1..0..0..1..1..1..0..0

..0..0..0..1..0..1..0..0..1....1..0..1..0..0..0..0..0..0

..1..1..0..1..0..0..1..0..0....1..0..1..0..1..1..0..0..1

CROSSREFS

Sequence in context: A224906 A168628 A178286 * A235185 A172842 A068077

Adjacent sequences:  A187935 A187936 A187937 * A187939 A187940 A187941

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 16 2011

STATUS

approved

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Last modified December 15 00:30 EST 2019. Contains 329988 sequences. (Running on oeis4.)