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A223698
Petersen graph (8,2) coloring a rectangular array: number of 7Xn 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 antidiagonal neighbor moves along an edge of this graph
1
268435456, 25509168, 2492365968, 294583794768, 49817845241568, 9525534763343040, 1976213549179804032, 422657522556480917712, 91790405609518662883056, 20048483735293013970568848
OFFSET
1,1
COMMENTS
Row 7 of A223692
LINKS
EXAMPLE
Some solutions for n=3
..0..8..0....0..8..0....0..8..0....0..8..0....0..8..0....0..8..0....0..8..0
..0..8..0....0..8..0....0..8..0....0..8..0....0..8..0....0..8..0....0..8..0
..0..8..0....0..8..0....0..8.10....0..8..0....0..8..0....0..8..0....0..8..0
.14..8.14....0..7..0...10..8..0....0..1..9...14..8.14...10..8..0...10..8.14
.14..6..7....6..7..6...10..8.10....2..1..9...14..8.14....0..8.10...14..8.14
..5..6..5....6.14.12...10..8.14....2..1..0...14.12.14...14..8.10...10.12.10
.14..6..5....8.10..8...14..8.10....9..1..9....4.12.10...14.12.10...10..8.10
CROSSREFS
Sequence in context: A358484 A011578 A223605 * A195237 A194936 A195253
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 25 2013
STATUS
approved