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A200267 Number of 0..3 arrays x(0..n+1) of n+2 elements with zero n-1st differences 0
1, 4, 4, 6, 8, 8, 8, 16, 4, 10, 12, 36, 20, 48, 8, 20, 28, 70, 28, 154, 8, 32, 40, 174, 16, 100, 4, 38, 44, 118 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 3 of A200272

LINKS

Table of n, a(n) for n=1..30.

EXAMPLE

All solutions for n=6

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

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

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

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

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

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

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

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

CROSSREFS

Sequence in context: A240119 A292755 A294021 * A273308 A105790 A338895

Adjacent sequences:  A200264 A200265 A200266 * A200268 A200269 A200270

KEYWORD

nonn

AUTHOR

R. H. Hardin Nov 15 2011

STATUS

approved

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Last modified May 13 02:36 EDT 2021. Contains 343836 sequences. (Running on oeis4.)