A187312 Half the number of (n+2)X6 binary arrays with each 3X3 subblock having sum 3, 4, 5 or 6

71836, 3029032, 125103786, 5243407780, 219684364642, 9206325629324, 385878307185440, 16174152113717987, 677941845846382141, 28416164592526303012, 1191073362353254969342, 49924255054152257493562

Offset

1,1

Comments

Column 4 of A187317

Links

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

Example

Some solutions for 4X6 with a(1,1)=0
..0..0..1..0..1..1....0..0..1..1..0..0....0..0..1..1..1..1....0..0..1..0..0..1
..0..1..1..0..1..1....0..1..0..0..1..0....0..0..0..1..1..0....0..1..1..1..1..0
..0..0..1..1..0..0....0..1..1..0..0..1....0..1..1..0..0..1....0..0..1..0..0..1
..0..0..0..0..1..1....0..0..0..1..1..1....0..0..1..0..0..0....0..1..1..0..1..1

Crossrefs

Sequence in context: A097245 A025292 A025310 * A080477 A234330 A333684

Adjacent sequences: A187309 A187310 A187311 * A187313 A187314 A187315

Keyword

nonn

Author

R. H. Hardin Mar 08 2011

Status

approved