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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 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Diagonal of A184153 LINKS Table of n, a(n) for n=1..6. 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 Adjacent sequences: A184141 A184142 A184143 * A184145 A184146 A184147 KEYWORD nonn AUTHOR R. H. Hardin Jan 09 2011 STATUS approved

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Last modified September 21 21:03 EDT 2023. Contains 365503 sequences. (Running on oeis4.)