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

21940, 491162, 13475116, 404927788, 12251680342, 372768662926, 11329725297298, 344897509718070, 10488584427995232, 319255468024182244, 9710751056424521182, 295543173753212342684, 8990520516421539201648

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