A183252 Half the number of n X 6 binary arrays with the number of 1-1 adjacencies equal to the number of 0-0 adjacencies.

6, 210, 7954, 417190, 23226996, 1333831052, 78105333988, 4635786110412, 277890240523800, 16785123061670988, 1019971463327377356, 62283161216818806836, 3818626448625617011996, 234919716668014392969048, 14494084105428001893992320, 896497109118913513342155780

Offset

1,1

Links

R. H. Hardin, Table of n, a(n) for n = 1..100

Example

Some solutions with a(1,1) = 0 for 3 X 6:
..0..1..0..1..1..0....0..1..1..1..1..0....0..0..0..1..0..1....0..0..1..1..0..1
..0..0..0..0..1..1....1..1..0..0..0..0....0..1..0..1..0..1....0..1..0..0..1..1
..1..1..1..0..1..0....0..0..1..1..0..1....1..0..1..1..1..0....0..1..0..1..0..1

Crossrefs

Column 6 of A183253.

Sequence in context: A065945 A076715 A029549 * A183287 A087639 A028350

Adjacent sequences: A183249 A183250 A183251 * A183253 A183254 A183255

Keyword

nonn

Author

R. H. Hardin, Jan 03 2011

Status

approved