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 A233177 Number of 4Xn 0..5 arrays with no element x(i,j) adjacent to itself or value 5-x(i,j) horizontally, diagonally or antidiagonally, top left element zero, and 1 appearing before 2 3 and 4, and 2 appearing before 3 in row major order (unlabelled 6-colorings with no clashing color pairs) 1
 48, 896, 96256, 7938048, 736362496, 65265467392, 5896922988544, 528589678182400, 47540804020862976, 4269747110598934528, 383704462840431640576, 34473222428763411709952, 3097514921527666217582592 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Row 4 of A233174 LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 FORMULA Empirical: a(n) = 64*a(n-1) +3328*a(n-2) -77824*a(n-3) -1441792*a(n-4) +28311552*a(n-5) +33554432*a(n-6) -1073741824*a(n-7) for n>8 EXAMPLE Some solutions for n=3 ..0..1..5....0..1..0....0..1..2....0..1..2....0..1..2....0..1..2....0..1..0 ..5..2..5....0..2..0....3..4..3....2..4..0....3..4..2....5..4..5....5..1..2 ..5..3..1....5..2..1....2..1..5....5..1..2....3..1..5....2..1..0....5..4..2 ..4..2..0....1..2..1....3..4..2....3..1..2....0..1..3....2..1..3....5..1..5 CROSSREFS Sequence in context: A241873 A233784 A233959 * A014703 A233674 A293778 Adjacent sequences: A233174 A233175 A233176 * A233178 A233179 A233180 KEYWORD nonn AUTHOR R. H. Hardin, Dec 05 2013 STATUS approved

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Last modified September 11 05:34 EDT 2024. Contains 375814 sequences. (Running on oeis4.)