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

268435456, 25509168, 2492365968, 294583794768, 49817845241568, 9525534763343040, 1976213549179804032, 422657522556480917712, 91790405609518662883056, 20048483735293013970568848

Offset

1,1

Comments

Row 7 of A223692

Links

R. H. Hardin, Table of n, a(n) for n = 1..50

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

Adjacent sequences: A223695 A223696 A223697 * A223699 A223700 A223701

Keyword

nonn

Author

R. H. Hardin Mar 25 2013

Status

approved