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 A231027 Number of nX4 0..2 arrays x(i,j) with each element horizontally, vertically or antidiagonally next to at least one element with value (x(i,j)+1) mod 3 and at least one element with value (x(i,j)-1) mod 3, and upper left element zero 1
 0, 62, 1074, 43566, 1444702, 50554618, 1740086452, 60169326764, 2078169462590, 71798088654394, 2480349543197958, 85688184666384078, 2960239863178974748, 102266505677802748874, 3532968690414317025252, 122052364457303115849762 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Column 4 of A231031 LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 EXAMPLE Some solutions for n=3 ..0..2..1..1....0..2..1..2....0..2..0..1....0..2..0..2....0..2..0..1 ..1..0..0..2....1..0..0..2....1..1..2..2....1..1..1..0....1..0..1..2 ..1..2..0..1....2..1..1..0....2..0..0..1....2..0..2..1....0..2..0..1 CROSSREFS Sequence in context: A157499 A249235 A250564 * A103428 A248450 A115504 Adjacent sequences:  A231024 A231025 A231026 * A231028 A231029 A231030 KEYWORD nonn AUTHOR R. H. Hardin, Nov 03 2013 STATUS approved

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Last modified May 17 16:12 EDT 2022. Contains 353747 sequences. (Running on oeis4.)