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 A233201 Number of nX7 0..7 arrays with no element x(i,j) adjacent to itself or value 7-x(i,j) horizontally, antidiagonally or vertically, top left element zero, and 1 appearing before 2 3 4 5 and 6, 2 appearing before 3 4 and 5, and 3 appearing before 4 in row major order (unlabelled 8-colorings with no clashing color pairs) 1
 1248, 2098176, 5496242176, 15635845218304, 46111939268444160, 138127371171167993856, 416547612309880393695232, 1259808519497450508966166528, 3814894993577338604838516162560 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 7 of A233202 LINKS R. H. Hardin, Table of n, a(n) for n = 1..101 EXAMPLE Some solutions for n=2 ..0..1..0..2..6..5..0....0..1..0..2..6..3..7....0..1..0..2..7..3..2 ..3..2..6..3..7..1..3....3..2..6..3..5..1..4....2..4..6..4..2..6..4 CROSSREFS Sequence in context: A233179 A224435 A233261 * A233244 A233222 A020384 Adjacent sequences:  A233198 A233199 A233200 * A233202 A233203 A233204 KEYWORD nonn AUTHOR R. H. Hardin, Dec 05 2013 STATUS approved

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Last modified May 7 10:32 EDT 2021. Contains 343650 sequences. (Running on oeis4.)