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A200266 Number of 0..2 arrays x(0..n+1) of n+2 elements with zero n-1st differences 0
1, 3, 3, 3, 5, 5, 5, 7, 3, 3, 7, 9, 11, 17, 5, 3, 13, 17, 15, 21, 5, 9, 21, 19, 9, 13, 3, 5, 21, 17 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 2 of A200272

LINKS

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

EXAMPLE

All solutions for n=6

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

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

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

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

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

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

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

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

CROSSREFS

Sequence in context: A162226 A001650 A130175 * A101290 A080605 A130823

Adjacent sequences:  A200263 A200264 A200265 * A200267 A200268 A200269

KEYWORD

nonn

AUTHOR

R. H. Hardin Nov 15 2011

STATUS

approved

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Last modified April 16 17:01 EDT 2021. Contains 343050 sequences. (Running on oeis4.)