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A223342
5X5X5 triangular graph coloring a rectangular array: number of nX6 0..14 arrays where 0..14 label nodes of a graph with edges 0,1 0,2 1,2 1,3 1,4 2,4 3,4 2,5 4,5 3,6 3,7 4,7 6,7 4,8 5,8 7,8 5,9 8,9 6,10 6,11 7,11 10,11 7,12 8,12 11,12 11,12 8,13 9,13 12,13 9,14 13,14 and every array movement to a horizontal or vertical neighbor moves along an edge of this graph
1
23712, 9474840, 4730218284, 2496237714588, 1348575549617448, 734147032128932496, 401058585082703800512, 219352570908026259076824, 120039440994934047671679228, 65703360655055548892110228722
OFFSET
1,1
COMMENTS
Column 6 of A223344
LINKS
EXAMPLE
Some solutions for n=3
..3..7..3..4..7.12....3..7..8..7..3..4....3..7..8..7..8.12....3..7..3..7..4..1
..7..3..7..3..6..7....7..3..7.12..7..3....7..3..7.11.12.11....7..3..7..8..7..4
..3..1..3..1..3..4....3..1..3..7..4..1....3..1..3..7.11..7....3..1..3..4..8..7
CROSSREFS
Sequence in context: A118061 A251855 A200437 * A179918 A168169 A344377
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 19 2013
STATUS
approved