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A184150
1/4 the number of (n+1)X7 0..3 arrays with every 2X2 subblock having at least two equal elements connected horizontally or vertically
1
8544883, 23019453235, 59956202692285, 156962462690881921, 410618317896670998877, 1074317319424680321399811, 2810726734347901488302111479, 7353703264467632594839577120701
OFFSET
1,1
COMMENTS
Column 6 of A184153
LINKS
EXAMPLE
Some solutions for 3X7 with a(1,1)=0
..0..0..0..0..1..0..2....0..0..0..0..1..2..0....0..0..0..0..3..0..0
..0..0..0..0..3..0..1....0..0..0..0..3..3..0....0..0..0..0..3..0..0
..0..0..0..0..2..0..1....0..0..0..1..1..1..0....0..0..0..0..2..0..3
CROSSREFS
Sequence in context: A203824 A081639 A141137 * A236450 A237074 A345616
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 09 2011
STATUS
approved