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A223555 Petersen graph (3,1) coloring a rectangular array: number of nX7 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 or antidiagonal neighbor moves along an edge of this graph, with the array starting at 0 1
729, 281763, 116124291, 48435199821, 20248676896077, 8468395670690901, 3541866135681593043, 1481382428937450207651, 619587781032925818024165, 259142468285816914838504985, 108386290103616110374877972691 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 7 of A223556

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210

FORMULA

Empirical: a(n) = 579*a(n-1) -77474*a(n-2) +4635156*a(n-3) -154699059*a(n-4) +3198735625*a(n-5) -43344055546*a(n-6) +396489063452*a(n-7) -2477765391092*a(n-8) +10544713088920*a(n-9) -29940917775104*a(n-10) +54099319050624*a(n-11) -56116354684928*a(n-12) +25386144890880*a(n-13) for n>15

EXAMPLE

Some solutions for n=3

..0..1..0..3..0..3..4....0..1..0..3..5..4..1....0..1..0..1..0..3..5

..0..1..0..2..0..3..0....0..1..0..2..1..4..5....0..1..0..2..5..4..1

..0..3..0..1..4..1..4....0..3..5..2..5..4..3....0..3..0..3..5..2..1

CROSSREFS

Sequence in context: A232954 A222168 A016890 * A222443 A223330 A228976

Adjacent sequences:  A223552 A223553 A223554 * A223556 A223557 A223558

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 22 2013

STATUS

approved

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Last modified April 3 23:48 EDT 2020. Contains 333207 sequences. (Running on oeis4.)