A187311 Half the number of (n+2) X 5 binary arrays with each 3 X 3 subblock having sum 3, 4, 5 or 6.

10262, 237650, 5422402, 125103786, 2885253967, 66555378453, 1535446610156, 35423389400148, 817231843461740, 18853921505477183, 434968805589706807, 10034934369985494192, 231510653332437370574, 5341059614442076742761

Offset

1,1

Comments

Column 3 of A187317.

Links

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

Example

Some solutions for 4 X 5 with a(1,1)=0
..0..0..0..1..0....0..1..1..0..0....0..0..1..1..0....0..0..0..0..1
..0..1..0..0..1....0..1..0..0..0....0..1..1..0..0....0..1..1..1..0
..1..1..1..0..0....0..0..1..0..1....1..0..0..0..0....1..0..1..0..0
..0..1..0..0..1....1..0..1..0..0....0..1..1..1..0....1..0..0..1..0

Crossrefs

Cf. A187317.

Sequence in context: A332532 A252031 A356979 * A289855 A204691 A270762

Adjacent sequences: A187308 A187309 A187310 * A187312 A187313 A187314

Keyword

nonn

Author

R. H. Hardin, Mar 08 2011

Status

approved