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

23712, 9474840, 4730218284, 2496237714588, 1348575549617448, 734147032128932496, 401058585082703800512, 219352570908026259076824, 120039440994934047671679228, 65703360655055548892110228722

Offset

1,1

Comments

Column 6 of A223344

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

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

Adjacent sequences: A223339 A223340 A223341 * A223343 A223344 A223345

Keyword

nonn

Author

R. H. Hardin Mar 19 2013

Status

approved