A213415 Half the number of nX5 binary arrays with no 3X3 submatrix formed with any three rows and columns equal to J-I

16, 512, 15109, 407498, 10142461, 235950302, 5190742489, 109049720858, 2205335209381, 43210168246742, 824573050113169, 15390308248104818

Offset

1,1

Comments

Column 5 of A213418

Links

Table of n, a(n) for n=1..12.

Example

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

Crossrefs

Sequence in context: A317522 A299651 A300205 * A303418 A301404 A303424

Adjacent sequences: A213412 A213413 A213414 * A213416 A213417 A213418

Keyword

nonn

Author

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

Status

approved