A213416 Half the number of nX6 binary arrays with no 3X3 submatrix formed with any three rows and columns equal to J-I

32, 2048, 114302, 5524088, 235950302, 9107867048, 323797652462, 10764286026008

Offset

1,1

Comments

Column 6 of A213418

Links

Table of n, a(n) for n=1..8.

Example

Some solutions for n=4
..1..0..0..1..1..0....0..0..0..0..1..0....1..0..1..1..1..0....1..0..1..1..1..0
..1..0..1..1..1..1....1..1..1..1..0..1....1..0..0..0..1..0....0..1..1..1..0..0
..1..1..0..1..0..0....0..1..0..1..0..0....0..1..1..0..0..1....1..0..1..1..1..1
..1..1..1..1..1..1....1..1..0..0..1..0....0..0..0..1..0..0....0..0..1..1..0..0

Crossrefs

Sequence in context: A302008 A301782 A316806 * A317523 A299652 A300206

Adjacent sequences: A213413 A213414 A213415 * A213417 A213418 A213419

Keyword

nonn

Author

R. H. Hardin and N. J. A. Sloane Jun 10 2012

Status

approved