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 A222915 Number of n X 4 0..2 arrays with exactly floor(n X 4/2) elements equal to at least one horizontal, vertical or antidiagonal neighbor, with new values introduced in row major 0..2 order. 1
 6, 136, 2952, 62336, 1309863, 27663713, 590514107, 12759661261, 278866376604, 6155545744454, 137016855340060, 3071168910680644, 69236193887795927, 1568315505284861894, 35666332338351971086, 813825644002258220522 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 4 of A222918. LINKS R. H. Hardin, Table of n, a(n) for n = 1..55 EXAMPLE Some solutions for n=3 ..0..1..0..1....0..1..1..2....0..1..0..2....0..1..0..0....0..0..1..0 ..2..1..1..2....2..2..2..1....0..0..1..0....2..1..1..1....0..0..2..1 ..0..2..0..2....0..1..0..2....1..2..0..1....0..2..0..2....1..1..0..2 CROSSREFS Cf. A222918. Sequence in context: A196852 A196946 A090407 * A367531 A245104 A075185 Adjacent sequences: A222912 A222913 A222914 * A222916 A222917 A222918 KEYWORD nonn AUTHOR R. H. Hardin Mar 09 2013 STATUS approved

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Last modified May 28 16:48 EDT 2024. Contains 372916 sequences. (Running on oeis4.)