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A223378 3X3 square grid graph coloring a rectangular array: number of nX7 0..8 arrays where 0..8 label nodes of the square grid graph and every array movement to a horizontal or vertical neighbor moves along an edge of this graph 1
4352, 1502736, 598980512, 242067684912, 98124582178928, 39794518790036624, 16140699524652927296, 6546839621183266518272, 2655488111339124689289728, 1077103711078803025921975888, 436888972160952271231852850736 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 7 of A223379

LINKS

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

EXAMPLE

Some solutions for n=3

..0..1..0..3..4..1..4....0..1..0..1..0..1..2....0..1..0..1..2..1..0

..1..0..3..4..3..4..3....1..0..1..2..1..4..1....1..0..1..4..1..4..1

..0..1..0..3..4..5..4....0..1..0..1..0..1..0....0..1..0..1..4..1..2

Vertex neighbors:

0 -> 1 3

1 -> 0 2 4

2 -> 1 5

3 -> 0 4 6

4 -> 3 1 5 7

5 -> 4 2 8

6 -> 3 7

7 -> 6 4 8

8 -> 7 5

CROSSREFS

Sequence in context: A252302 A235066 A170786 * A239193 A068292 A185796

Adjacent sequences:  A223375 A223376 A223377 * A223379 A223380 A223381

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 19 2013

STATUS

approved

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Last modified January 28 06:26 EST 2022. Contains 350654 sequences. (Running on oeis4.)