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A233169 Number of n X n 0..5 arrays with no element x(i,j) adjacent to itself or value 5-x(i,j) horizontally, diagonally or antidiagonally, top left element zero, and 1 appearing before 2 3 and 4, and 2 appearing before 3 in row major order (unlabelled 6-colorings with no clashing color pairs) 1
1, 8, 2688, 7938048, 221463445504, 48667983827959808, 95229762257179140685824, 1517114635517382193142028042240, 212050285595421539693130354498977398784, 244891984772140151804896156943078190424499683328 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A233174

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..13

EXAMPLE

Some solutions for n=3

..0..1..2....0..1..2....0..1..2....0..1..5....0..1..5....0..1..2....0..1..0

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

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

CROSSREFS

Sequence in context: A210126 A259440 A172957 * A233122 A017547 A046248

Adjacent sequences:  A233166 A233167 A233168 * A233170 A233171 A233172

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 05 2013

STATUS

approved

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Last modified December 7 08:34 EST 2021. Contains 349574 sequences. (Running on oeis4.)