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 A230828 Number of nX5 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 and at least one element with value (x(i,j)-1) mod 4, no adjacent elements equal, and upper left element zero 1
 0, 16, 38, 176, 898, 4350, 22852, 122740, 661598, 3593650, 19572998, 106801924, 583264796, 3186690816, 17414382012, 95176462582, 520213927428, 2843500943294, 15543058517272, 84962392690912, 464431030442718, 2538739709562252 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Column 5 of A230831 LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 EXAMPLE Some solutions for n=4 ..0..1..3..1..0....0..3..0..3..0....0..3..2..0..2....0..3..2..0..1 ..3..2..0..2..3....1..2..1..2..1....1..0..1..3..1....1..0..1..3..2 ..0..1..3..1..0....0..3..0..3..2....2..3..2..0..3....2..3..2..1..0 ..3..2..0..2..3....2..1..2..0..1....0..1..3..1..2....1..0..3..2..3 CROSSREFS Sequence in context: A166112 A224738 A304014 * A122030 A122029 A218900 Adjacent sequences: A230825 A230826 A230827 * A230829 A230830 A230831 KEYWORD nonn AUTHOR R. H. Hardin, Oct 30 2013 STATUS approved

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Last modified March 26 17:26 EDT 2023. Contains 361551 sequences. (Running on oeis4.)