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A183255
Number of n X n binary arrays with the number of 0-1 adjacencies equal to the number of 0-0 adjacencies
0
2, 5, 39, 1899, 526941, 553836104, 2209503331909, 33131995796175560, 1855564362850749460006, 386500467555938135363021737
OFFSET
1,1
COMMENTS
Diagonal of A183262
EXAMPLE
Some solutions for 3X3
..0..0..0....0..0..0....1..0..1....1..1..1....1..1..1....0..0..1....0..0..0
..0..1..0....0..1..1....0..0..0....1..1..1....0..0..1....0..0..0....0..1..0
..1..0..0....0..1..1....0..0..1....1..1..1....0..0..1....1..1..1....1..1..0
CROSSREFS
Sequence in context: A362800 A376640 A357822 * A307141 A109003 A120031
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 03 2011
STATUS
approved