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A213984
Number of n X n 0..2 matrices whose square is also a 0..2 matrix
0
2, 24, 1003, 120133, 35799856, 24651985100
OFFSET
1,1
COMMENTS
Column 2 of A213990
EXAMPLE
Some solutions for n=3
..0..1..1....1..0..1....0..2..0....0..1..0....1..1..2....0..0..0....0..1..2
..0..0..2....0..0..2....0..0..0....0..1..2....0..0..0....0..0..0....1..0..0
..0..0..0....0..1..0....0..0..0....0..0..0....0..0..0....0..0..0....0..1..0
CROSSREFS
Sequence in context: A062029 A122551 A136524 * A129622 A268311 A362091
KEYWORD
nonn
AUTHOR
R. H. Hardin Jun 30 2012
STATUS
approved