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A223605
Petersen graph (8,2) coloring a rectangular array: number of 7 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, diagonal or antidiagonal neighbor moves along an edge of this graph.
1
268435456, 1180256, 236213312, 20631729648, 3355919411936, 488183756623568, 78546923445668960, 12456911118159504464, 2003721183655242155360, 321631735635728311838256, 51731199109756440589448464
OFFSET
1,1
COMMENTS
Row 7 of A223599.
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...10..8.10....0..8..0...10..8.10....0..8..0...10..8.10...14..8..0
..0..8..0...14.12.10....0..7..0....0..8.10....0..1..0...10..2.10...14..8.10
..0..1..0...10.12.14...15..7.15...14..8.10....2..1..2...10..2..1...10.12.10
..0..7..0...10.12.10....6..7.15...14..8.10....9..1..0...10..2..3....4.12.14
..0..7.15....4.12.10....6..7.15....0..8.14....0..1..2...10..2.10...14.12.10
CROSSREFS
Cf. A223599.
Sequence in context: A295477 A358484 A011578 * A223698 A195237 A194936
KEYWORD
nonn
AUTHOR
R. H. Hardin, Mar 23 2013
STATUS
approved