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 A223448 4-level binary fanout graph coloring a rectangular array: number of nX7 0..14 arrays where 0..14 label nodes of a graph with edges 0,1 1,3 3,5 3,6 1,4 4,7 4,8 0,2 2,9 9,11 9,12 2,10 10,13 10,14 and every array movement to a horizontal or vertical neighbor moves along an edge of this graph 1
 1752, 102528, 7557696, 553773760, 42196917280, 3173584196608, 242750087582720, 18355130761851904, 1404211778503671808, 106325547561713332224, 8132796906906251831296, 616068752536307030687744 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 7 of A223449 LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 EXAMPLE Some solutions for n=3 ..0..1..3..5..3..1..4....0..1..3..1..0..1..4....0..1..4..1..0..1..4 ..1..0..1..3..1..4..8....1..3..1..0..1..3..1....1..3..1..3..1..3..1 ..0..2..0..1..0..1..4....0..1..0..1..3..5..3....0..1..0..1..4..1..4 CROSSREFS Sequence in context: A251892 A143994 A157325 * A102327 A076809 A272326 Adjacent sequences:  A223445 A223446 A223447 * A223449 A223450 A223451 KEYWORD nonn AUTHOR R. H. Hardin Mar 20 2013 STATUS approved

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Last modified November 26 07:25 EST 2020. Contains 338632 sequences. (Running on oeis4.)