A186060 Number of (n+2)X8 binary arrays with each 3X3 subblock having a positive determinant

20475, 319247, 3894282, 40407070, 545528022, 6541274560, 72905263923, 948612706087, 11378633159391, 128977165646242, 1651775736889251, 19897356422385746, 227128059650587084, 2877087007288462801

Offset

1,1

Comments

Column 6 of A186063

Links

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

Example

Some solutions for 4X8
..0..1..1..0..0..1..0..0....0..0..1..0..0..1..1..1....0..1..0..0..1..0..1..1
..1..0..0..1..0..0..1..0....1..0..0..1..1..0..1..1....0..1..1..1..1..1..0..1
..0..1..0..0..1..0..0..1....0..1..1..0..1..0..0..1....1..0..0..1..0..0..1..0
..0..1..1..0..0..1..1..0....0..0..1..0..0..1..1..1....1..1..0..1..1..0..0..1

Crossrefs

Sequence in context: A234304 A242619 A224619 * A253866 A253873 A253539

Adjacent sequences: A186057 A186058 A186059 * A186061 A186062 A186063

Keyword

nonn

Author

R. H. Hardin Feb 11 2011

Status

approved