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 A223498 Petersen graph (3,1) coloring a rectangular array: number of n X n 0..5 arrays where 0..5 label nodes of a graph with edges 0,1 0,3 3,5 3,4 1,2 1,4 4,5 2,0 2,5 and every array movement to a horizontal, diagonal or antidiagonal neighbor moves along an edge of this graph, with the array starting at 0. 0
 1, 19, 1519, 426359, 515473927, 2519813048575, 51596648899152901, 4382197669772597921079, 1555039484181265199709474223, 2303272223887812126256525632339813 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Diagonal of A223504. LINKS Table of n, a(n) for n=1..10. EXAMPLE Some solutions for n=3 ..0..3..0....0..2..5....0..3..0....0..2..1....0..1..0....0..1..0....0..2..0 ..0..2..0....0..3..0....4..1..4....0..2..1....4..1..4....2..1..0....5..3..0 ..0..2..5....0..3..0....2..5..2....0..2..5....4..3..4....0..1..0....0..3..5 CROSSREFS Cf. A223504. Sequence in context: A051847 A217830 A002115 * A352465 A054949 A242564 Adjacent sequences: A223495 A223496 A223497 * A223499 A223500 A223501 KEYWORD nonn AUTHOR R. H. Hardin, Mar 21 2013 STATUS approved

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Last modified April 23 19:56 EDT 2024. Contains 371916 sequences. (Running on oeis4.)