A186058 Number of (n+2)X6 binary arrays with each 3X3 subblock having a positive determinant

2328, 18376, 128303, 836891, 5877960, 40407070, 275207345, 1895454019, 13007169394, 89136850704, 612015399430, 4198884666511, 28801139319651, 197648603598770, 1355993974788845, 9302424752127932, 63831781852560836

Offset

1,1

Comments

Column 4 of A186063

Links

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

Example

Some solutions for 4X6
..0..1..0..1..1..1....1..1..1..1..1..1....1..0..0..1..1..1....0..1..1..1..1..1
..0..0..1..1..0..1....0..1..1..0..1..1....0..1..0..0..1..0....1..0..0..1..1..0
..1..0..0..1..0..0....1..0..1..1..0..1....1..0..1..0..0..1....1..1..0..0..1..0
..1..1..0..1..1..0....1..0..0..1..1..1....1..1..0..1..1..1....1..1..1..1..1..1

Crossrefs

Sequence in context: A115933 A355420 A232107 * A309672 A238175 A203344

Adjacent sequences: A186055 A186056 A186057 * A186059 A186060 A186061

Keyword

nonn

Author

R. H. Hardin Feb 11 2011

Status

approved