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

8544883, 23019453235, 59956202692285, 156962462690881921, 410618317896670998877, 1074317319424680321399811, 2810726734347901488302111479, 7353703264467632594839577120701

Offset

1,1

Comments

Column 6 of A184153

Links

R. H. Hardin, Table of n, a(n) for n = 1..27

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

Adjacent sequences: A184147 A184148 A184149 * A184151 A184152 A184153

Keyword

nonn

Author

R. H. Hardin Jan 09 2011

Status

approved