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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 (list; graph; refs; listen; history; text; internal format)
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 A242346

Adjacent sequences:  A184147 A184148 A184149 * A184151 A184152 A184153

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 09 2011

STATUS

approved

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Last modified September 27 03:21 EDT 2020. Contains 337380 sequences. (Running on oeis4.)