A223343 5X5X5 triangular graph coloring a rectangular array: number of nX7 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

106560, 106904016, 138947808456, 193291992449808, 277054255741556856, 401058585082703800512, 583604491391809096656324, 850485672767214270573728268, 1240731947888264978798585678280

Offset

1,1

Comments

Column 7 of A223344

Links

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

Example

Some solutions for n=3
..7..3..1..0..1..0..1....7..3..1..4..7..4..5....7..3..1..4..5..4..8
..3..1..0..2..0..2..0....3..1..0..2..4..7..4....3..1..0..1..4..8..4
..1..0..1..0..2..4..1....1..0..1..0..1..4..1....1..0..1..0..1..4..8

Crossrefs

Sequence in context: A237542 A237081 A253404 * A028466 A157105 A122711

Adjacent sequences: A223340 A223341 A223342 * A223344 A223345 A223346

Keyword

nonn

Author

R. H. Hardin Mar 19 2013

Status

approved