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A200148 Number of 0..2 arrays x(0..n-1) of n elements with zero n-1st difference 0
1, 3, 5, 9, 15, 39, 45, 129, 149, 243, 369, 1365, 2061, 5901, 5951, 7785, 10519, 42519, 59473, 213561, 157559, 278835, 503513, 1553481, 1051639, 2491707, 2981747, 6622209, 10056593, 34139241 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 2 of A200154

LINKS

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

EXAMPLE

Some solutions for n=6

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

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

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

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

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

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

CROSSREFS

Sequence in context: A027154 A217350 A210844 * A052007 A117480 A018260

Adjacent sequences:  A200145 A200146 A200147 * A200149 A200150 A200151

KEYWORD

nonn

AUTHOR

R. H. Hardin Nov 13 2011

STATUS

approved

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Last modified February 24 01:16 EST 2020. Contains 332195 sequences. (Running on oeis4.)