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A184144
1/4 the number of (n+1)X(n+1) 0..3 arrays with every 2X2 subblock having at least two equal elements connected horizontally or vertically
0
43, 17203, 58656073, 1764076701091, 464796062784203293, 1074317319424680321399811
OFFSET
1,1
COMMENTS
Diagonal of A184153
EXAMPLE
Some solutions for 3X3 with a(1,1)=0
..0..2..2....0..2..3....0..2..2....0..1..1....0..3..1....0..0..0....0..2..3
..0..0..0....3..3..3....0..2..3....1..1..1....1..3..2....0..2..2....0..2..2
..2..3..3....2..1..2....3..2..0....2..3..2....2..3..3....0..2..0....2..2..0
CROSSREFS
Sequence in context: A183489 A361892 A356203 * A262856 A302484 A177488
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 09 2011
STATUS
approved