A223551 Petersen graph (3,1) coloring a rectangular array: number of n X n 0..5 arrays where 0..5 label nodes of a graph with edges 0,1 0,3 3,5 3,4 1,2 1,4 4,5 2,0 2,5 and every array movement to a horizontal or antidiagonal neighbor moves along an edge of this graph, with the array starting at 0.
1, 27, 3249, 1795473, 4715559621, 59043582882099, 3541866135681593043, 1020092567883788131348995, 1412857454503152706541498629089, 9420448274769727958157865214329990383
Offset: 1
Keywords
Examples
Some solutions for n=3 ..0..1..4....0..3..4....0..3..4....0..3..0....0..3..4....0..2..0....0..3..4 ..0..3..0....5..3..4....5..3..0....5..3..4....5..3..4....0..2..1....4..5..4 ..0..2..1....4..5..2....4..3..4....4..3..0....0..3..0....5..4..1....4..1..2
Links
- R. H. Hardin, Table of n, a(n) for n = 1..12
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