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A223407 4X4X4 triangular graph without horizontal edges coloring a rectangular array: number of n X n 0..9 arrays where 0..9 label nodes of a graph with edges 0,1 0,2 1,3 1,4 2,4 2,5 3,6 3,7 4,7 4,8 5,8 5,9 and every array movement to a horizontal or vertical neighbor moves along an edge of this graph 1
10, 132, 10496, 4222748, 8949958604, 95513129162264, 5291975389978126280, 1474413700790967027512272, 2128059896246198793880831622720, 15441445504387727838090586696442043920 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A223415

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..11

EXAMPLE

Some solutions for n=3

..4..7..3....8..4..1....2..4..1....5..8..4....1..4..1....1..3..7....4..2..0

..1..4..7....4..8..4....4..7..3....8..4..2....0..2..4....3..7..4....2..0..1

..4..7..4....2..4..2....1..3..7....4..2..5....2..4..8....1..4..8....0..2..4

CROSSREFS

Sequence in context: A166771 A264279 A296637 * A203325 A324421 A284162

Adjacent sequences:  A223404 A223405 A223406 * A223408 A223409 A223410

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 20 2013

STATUS

approved

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Last modified September 21 16:31 EDT 2021. Contains 347598 sequences. (Running on oeis4.)