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A186901 Number of (n+1)X9 binary arrays with every 2X2 subblock determinant equal to exactly one or two horizontal and vertical neighbor 2X2 subblock determinants 1
14860, 19040, 122820, 608194, 2203303, 12599670, 85310077, 523902288, 2795274149, 16608468926, 108609778968, 679604170463, 3947135094182, 24085962638564, 153869560878987, 960883396722563, 5783252949932518 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 8 of A186902

LINKS

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

EXAMPLE

Some solutions for 3X9

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

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

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

CROSSREFS

Sequence in context: A177412 A209947 A023045 * A185486 A031815 A235236

Adjacent sequences:  A186898 A186899 A186900 * A186902 A186903 A186904

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 28 2011

STATUS

approved

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Last modified August 2 02:40 EDT 2021. Contains 346409 sequences. (Running on oeis4.)