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 A223441 4-level binary fanout graph coloring a rectangular array: number of n X n 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
 15, 104, 2988, 262368, 78731136, 75601620736, 242750087582720, 2529851595786153984, 87870306455802168307712, 9952833093128726406499139584, 3754882287727806523042164409106432 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Diagonal of A223449 LINKS R. H. Hardin, Table of n, a(n) for n = 1..13 EXAMPLE Some solutions for n=3 .13.10..2....0..2..9....3..1..0...13.10.13....7..4..8....2..9..2...12..9.11 .10.13.10....2..0..2....1..0..1...10.14.10....4..7..4...10..2..9....9.11..9 ..2.10.14...10..2..9....4..1..4....2.10.13....1..4..7...14.10..2...11..9..2 CROSSREFS Sequence in context: A219624 A219170 A227331 * A300295 A102791 A335672 Adjacent sequences: A223438 A223439 A223440 * A223442 A223443 A223444 KEYWORD nonn AUTHOR R. H. Hardin Mar 20 2013 STATUS approved

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Last modified February 25 19:26 EST 2024. Contains 370332 sequences. (Running on oeis4.)