A183288 Half the number of nX7 binary arrays with the number of 1-1 horizontal, vertical, diagonal and antidiagonal adjacencies equal to the number of 0-0 adjacencies

10, 756, 9746, 5358022, 174883800, 60444425412, 2929353057775, 768160567979820, 47876202708400536, 10382143445060064080, 771704842790704284567, 145964939271715586750070, 12337676708848223976794880

Offset

1,1

Comments

Column 7 of A183289

Links

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

Example

Some solutions for 3X7 with a(1,1)=0
..0..0..1..1..1..1..0....0..0..0..1..1..0..1....0..0..1..1..1..0..0
..1..0..1..0..0..1..0....0..1..1..1..1..0..0....1..0..0..1..1..0..0
..0..0..1..0..1..1..0....1..1..0..0..0..0..1....0..1..1..1..0..1..0

Crossrefs

Sequence in context: A015509 A117257 A030979 * A108247 A108243 A323494

Adjacent sequences: A183285 A183286 A183287 * A183289 A183290 A183291

Keyword

nonn

Author

R. H. Hardin Jan 03 2011

Status

approved