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 A223433 Generalized Petersen graph (8,2) coloring a rectangular array: number of n X n 0..15 arrays where 0..15 label nodes of a graph with edges 0,1 0,8 8,14 8,10 1,2 1,9 9,15 9,11 2,3 2,10 10,12 3,4 3,11 11,13 4,5 4,12 12,14 5,6 5,13 13,15 6,7 6,14 7,0 7,15 and every array movement to a horizontal or vertical neighbor moves along an edge of this graph 0
 16, 256, 14112, 3099264, 3049973040, 14233389951648, 313233804577725904, 31773869927610747929664, 14659288101904896523559420400, 30618348337161405692150233995935392 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Diagonal of A223440 LINKS EXAMPLE Some solutions for n=3 ..6..7.15...15.13.11....4..5..6....3..4..5....4.12..4...10..8.10...15.13.11 ..7..0..7...13.15..9....5..6..7....4..5..4....5..4..5...12.10..8...13.11.13 ..6..7..0...15..9.11....6..7..6....5..6..5....4..5.13....4.12.14...15..9.15 CROSSREFS Sequence in context: A230142 A247165 A204080 * A223593 A067223 A041113 Adjacent sequences: A223430 A223431 A223432 * A223434 A223435 A223436 KEYWORD nonn AUTHOR R. H. Hardin Mar 20 2013 STATUS approved

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Last modified March 31 05:21 EDT 2023. Contains 361634 sequences. (Running on oeis4.)