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A205432
Number of (n+1)X(n+1) 0..3 arrays with every 2X2 subblock having the same number of equal edges, and new values 0..3 introduced in row major order
0
15, 833, 302148, 869874577, 15852623627426, 1606623426666766016, 889483689986105362021688
OFFSET
1,1
COMMENTS
Diagonal of A205440
EXAMPLE
Some solutions for n=4
..0..0..0..0..0....0..1..0..1..0....0..1..1..0..0....0..0..0..0..1
..0..1..0..1..0....0..0..0..0..0....1..1..0..0..1....0..1..0..1..1
..0..1..0..0..0....3..0..2..0..2....0..0..0..1..1....0..0..0..0..1
..0..0..0..3..0....3..0..0..0..0....0..1..0..0..0....0..3..3..0..1
..1..0..3..3..3....3..3..3..3..3....1..1..0..2..2....3..3..0..0..0
CROSSREFS
Sequence in context: A230181 A187803 A261828 * A020240 A281695 A223276
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 27 2012
STATUS
approved