A206127 Number of (n+1)X8 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

74714, 2591052, 112183711, 5199505646, 242348711498, 11329725297298, 529835514016558, 24790820344981160, 1159975079177724794, 54282106023803646726, 2540175779566884282117, 118872371638134536408162

Offset

1,1

Comments

Column 7 of A206128

Links

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

Example

Some solutions for n=4
..1..2..2..0..1..0..2..2....2..1..0..2..1..2..2..1....2..2..1..2..0..1..0..1
..2..1..0..2..0..2..1..0....1..0..1..0..2..1..0..2....1..0..2..0..2..2..1..2
..0..2..1..0..2..0..2..1....2..1..0..1..0..2..1..0....2..1..0..2..1..0..2..0
..1..0..2..1..0..1..0..2....0..2..1..2..1..0..2..1....0..2..1..0..2..1..0..1
..0..2..1..2..1..2..1..0....2..1..2..0..2..1..0..2....1..0..2..1..0..2..1..0

Crossrefs

Sequence in context: A058415 A238521 A104846 * A230221 A252242 A210051

Adjacent sequences: A206124 A206125 A206126 * A206128 A206129 A206130

Keyword

nonn

Author

R. H. Hardin Feb 04 2012

Status

approved