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A263906
Number of (n+2)X(n+2) 0..1 arrays with each row and column modulo 3 equal to 1, read as a binary number with top and left being the most significant bits.
0
5, 16, 2399, 320148, 394241389, 1207439092800, 19392931688071671, 1069567598053941396580
OFFSET
1,1
COMMENTS
Diagonal of A263913.
EXAMPLE
Some solutions for n=3
..0..1..1..0..1....0..1..0..1..0....1..0..0..0..0....1..0..0..1..1
..0..0..0..0..1....0..0..0..0..1....1..0..0..0..0....0..0..1..1..1
..1..1..0..0..1....1..0..0..1..1....0..0..1..0..0....1..1..1..1..1
..1..1..0..0..1....0..1..0..1..0....0..0..1..0..0....1..1..0..0..1
..1..0..0..1..1....0..1..1..0..1....1..1..1..1..1....0..1..1..0..1
CROSSREFS
Cf. A263913.
Sequence in context: A304762 A317460 A341436 * A160739 A092679 A277534
KEYWORD
nonn
AUTHOR
R. H. Hardin, Oct 29 2015
STATUS
approved