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A205311
Number of (n+1) X (n+1) 0..1 arrays with every 2 X 2 subblock having the same number of equal edges, and new values 0..1 introduced in row major order.
1
8, 84, 2606, 193664, 33865634, 13956665238, 13574876544398, 31191658416342676, 169426507164530254382, 2176592549084872196370726, 66158464020552857153017287242, 4759146677426447759184119036493678
OFFSET
1,1
COMMENTS
Diagonal of A205318.
LINKS
EXAMPLE
Some solutions for n=4
..0..1..1..1..0....0..1..0..0..0....0..1..1..0..0....0..0..0..0..1
..1..1..0..1..0....1..1..0..1..0....0..1..0..0..1....0..1..0..1..1
..1..0..0..0..0....0..0..0..0..0....1..1..1..0..0....0..1..1..1..0
..0..0..1..0..1....1..1..0..1..0....0..0..1..0..1....0..1..0..1..1
..0..1..1..0..0....1..0..0..1..0....0..1..1..0..1....1..1..1..1..0
CROSSREFS
Cf. A205318.
Sequence in context: A346684 A350264 A113376 * A258338 A245197 A281340
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 25 2012
STATUS
approved