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A183254
Half the number of nX(n+1) binary arrays with the number of 1-1 adjacencies equal to the number of 0-0 adjacencies
1
1, 6, 164, 29100, 23226996, 78105333988, 1085842065488760, 61809250773984051624, 14321625018219960186079740, 13455454986809863455046035960864, 51120484864308189550041467825141803152
OFFSET
1,2
COMMENTS
Superdiagonal 1 of A183253
LINKS
EXAMPLE
Some solutions with a(1,1)=0 for 4X5
..0..1..0..1..0....0..1..1..1..0....0..1..0..1..1....0..0..1..1..0
..0..1..0..1..0....1..0..0..0..1....0..1..1..0..1....1..0..1..1..1
..1..1..0..1..1....0..0..1..1..0....0..1..1..0..0....0..0..1..0..0
..0..1..0..0..0....1..1..0..1..0....1..0..0..0..1....1..1..0..0..1
CROSSREFS
Sequence in context: A078535 A177781 A178435 * A143534 A104729 A106661
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 03 2011
STATUS
approved