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A219304
Unchanging value maps: number of n X n binary arrays indicating the locations of corresponding elements unequal to no horizontal or vertical neighbor in a random 0..2 n X n array
0
1, 6, 90, 3334, 326444, 89981627, 68906619754, 144049729095880
OFFSET
1,2
COMMENTS
Diagonal of A219310
EXAMPLE
Some solutions for n=3
..0..0..0....1..0..0....1..1..1....1..0..0....0..0..0....0..1..1....1..1..1
..0..0..0....0..0..1....1..1..0....1..0..0....0..0..1....0..0..1....0..0..0
..0..0..0....1..0..0....1..0..0....1..1..0....0..0..1....0..1..1....0..0..0
CROSSREFS
Sequence in context: A013297 A232979 A218758 * A305324 A265088 A077370
KEYWORD
nonn
AUTHOR
R. H. Hardin Nov 17 2012
STATUS
approved