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A223420 3-level binary fanout graph coloring a rectangular array: number of nX5 0..6 arrays where 0..6 label nodes of a graph with edges 0,1 1,3 1,4 0,2 2,5 2,6 and every array movement to a horizontal or vertical neighbor moves along an edge of this graph 1
104, 1584, 29912, 486016, 9210784, 150006016, 2844612736, 46345527296, 878977950208, 14321836797952, 271631946213376, 4425979070611456, 83944852851777536, 1367805247361974272, 25942363680265961472 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 5 of A223423

LINKS

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

FORMULA

Empirical: a(n) = 392*a(n-2) -26768*a(n-4) +353408*a(n-6) -1274624*a(n-8) +1441792*a(n-10) -307200*a(n-12) for n>13

EXAMPLE

Some solutions for n=3

..0..2..6..2..6....2..6..2..0..2....0..1..3..1..3....0..2..0..2..6

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

..0..2..5..2..0....2..0..1..3..1....4..1..0..1..0....0..2..6..2..5

CROSSREFS

Sequence in context: A187589 A200196 A234219 * A250325 A244946 A186931

Adjacent sequences:  A223417 A223418 A223419 * A223421 A223422 A223423

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 20 2013

STATUS

approved

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Last modified December 2 20:25 EST 2021. Contains 349445 sequences. (Running on oeis4.)