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URL: https://oeis.org/A200150
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A200150
Number of 0..4 arrays x(0..n-1) of n elements with zero n-1st difference.
0
1, 5, 13, 41, 103, 275, 685, 2525, 5221, 13897, 32717, 176145, 321963, 1390895, 2223445, 3845743, 10539177, 76756525, 147653093, 808935605, 934179307
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OFFSET
1,2
COMMENTS
Column 4 of
A200154
LINKS
Table of n, a(n) for n=1..21.
EXAMPLE
Some solutions for n=6
..1....1....4....1....2....1....2....4....2....1....1....0....2....1....4....3
..2....0....1....1....1....2....1....0....1....4....1....2....3....4....1....2
..2....2....2....4....3....3....1....2....1....1....3....1....4....3....1....3
..2....4....2....4....3....4....1....4....2....0....4....1....3....2....2....2
..2....4....1....1....1....4....1....4....3....2....3....2....1....2....3....0
..1....1....4....1....2....1....2....4....2....1....1....0....2....1....4....3
CROSSREFS
Sequence in context:
A080267
A034735
A305464
*
A287017
A229747
A182300
Adjacent sequences:
A200147
A200148
A200149
*
A200151
A200152
A200153
KEYWORD
nonn
AUTHOR
R. H. Hardin
, Nov 13 2011
STATUS
approved
