A186045 Number of (n+2)X4 binary arrays with each 3X3 subblock singular

2038, 21466, 224698, 2270854, 23369314, 240280270, 2466606274, 25348415950, 260479732738, 2676521643406, 27504010370530, 282631133426158, 2904313272748546, 29844803812097998, 306686035021471138

Offset

1,1

Comments

Column 2 of A186052

Links

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

Formula

Empirical: a(n)=14*a(n-1)-45*a(n-2)+184*a(n-3)-1468*a(n-4)+3604*a(n-5)-10460*a(n-6)+45192*a(n-7)-66568*a(n-8)+121728*a(n-9)-342032*a(n-10)+234240*a(n-11)-343296*a(n-12)+580608*a(n-13)

Example

Some solutions for 6X4
..0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0
..0..1..0..1....0..1..0..1....0..0..0..0....0..1..0..0....0..1..0..1
..0..1..0..1....1..0..0..1....0..0..0..1....0..0..0..0....0..1..0..1
..0..1..0..0....0..0..0..1....0..0..0..1....0..1..1..0....0..0..1..1
..1..1..0..1....1..1..1..0....0..0..1..0....0..1..0..1....0..0..0..0
..0..0..0..1....1..0..0..0....1..0..1..1....0..1..0..1....0..1..1..0

Crossrefs

Sequence in context: A212477 A020413 A031806 * A258965 A250009 A015158

Adjacent sequences: A186042 A186043 A186044 * A186046 A186047 A186048

Keyword

nonn

Author

R. H. Hardin Feb 11 2011

Status

approved