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.

268435456, 1180256, 236213312, 20631729648, 3355919411936, 488183756623568, 78546923445668960, 12456911118159504464, 2003721183655242155360, 321631735635728311838256, 51731199109756440589448464

Offset

1,1

Comments

Row 7 of A223599.

Links

R. H. Hardin, Table of n, a(n) for n = 1..28

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

Adjacent sequences: A223602 A223603 A223604 * A223606 A223607 A223608

Keyword

nonn

Author

R. H. Hardin, Mar 23 2013

Status

approved