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A206126 Number of (n+1)X7 0..2 arrays with every 2X2 subblock having nonzero determinant and having the same number of clockwise edge increases as its horizontal and vertical neighbors 1
21940, 491162, 13475116, 404927788, 12251680342, 372768662926, 11329725297298, 344897509718070, 10488584427995232, 319255468024182244, 9710751056424521182, 295543173753212342684, 8990520516421539201648 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 6 of A206128

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210

EXAMPLE

Some solutions for n=4

..2..1..0..2..1..2..2....0..1..0..1..2..0..2....2..2..1..2..0..1..2

..1..1..1..1..1..1..2....1..0..2..0..1..1..0....1..0..2..1..1..0..1

..2..1..0..1..2..1..1....0..2..1..1..0..2..1....0..2..1..0..2..1..0

..0..1..1..1..1..1..2....2..1..0..2..1..0..2....1..0..2..1..0..2..1

..1..1..2..1..0..1..1....1..0..1..0..2..1..0....2..1..0..2..1..0..2

CROSSREFS

Sequence in context: A345156 A031647 A045109 * A077751 A066693 A262821

Adjacent sequences:  A206123 A206124 A206125 * A206127 A206128 A206129

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 04 2012

STATUS

approved

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Last modified July 2 21:48 EDT 2022. Contains 355029 sequences. (Running on oeis4.)