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 A230908 Number of nX6 0..3 arrays x(i,j) with each element horizontally, vertically or antidiagonally next to at least one element with value (x(i,j)+1) mod 4, no adjacent elements equal, and upper left element zero 1
 0, 272, 2676, 23614, 219696, 2121666, 20713786, 202875672, 1989694528, 19528076278, 191729518620, 1882751038230, 18489720853716, 181586260234680, 1783375832120916, 17514856242872756, 172017407770200164 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Column 6 of A230910 LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 EXAMPLE Some solutions for n=4 ..0..3..1..0..2..1....0..1..2..3..1..2....0..2..3..1..0..3....0..2..0..1..3..0 ..1..0..2..3..0..2....3..0..1..0..3..1....1..0..2..3..2..1....1..3..2..0..1..2 ..2..3..0..2..1..3....1..2..3..1..2..0....3..1..0..1..3..2....0..1..3..2..0..3 ..1..2..1..3..0..2....0..1..2..0..3..2....0..2..3..2..0..1....3..0..1..3..1..2 CROSSREFS Sequence in context: A158587 A304417 A316242 * A305952 A317213 A178268 Adjacent sequences:  A230905 A230906 A230907 * A230909 A230910 A230911 KEYWORD nonn AUTHOR R. H. Hardin, Nov 01 2013 STATUS approved

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Last modified December 1 01:37 EST 2021. Contains 349426 sequences. (Running on oeis4.)