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A217889
Number of n element 1..n arrays with each element the minimum of 6 adjacent elements of a permutation of 1..n+5 of n+5 elements
0
1, 3, 11, 45, 197, 903, 4278, 20788, 103050, 519268, 2653278, 13725388
(list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Column 6 of A217891
LINKS
Table of n, a(n) for n=1..12.
EXAMPLE
Some solutions for n=4
..2....2....1....1....3....4....3....1....1....4....1....2....1....3....2....4
..4....2....1....3....1....2....2....1....2....3....1....3....4....3....2....2
..3....2....1....4....1....2....2....1....4....1....2....1....3....1....4....1
..1....1....4....2....1....1....1....1....3....1....4....1....2....1....1....1
CROSSREFS
Sequence in context: A217888 A146086 A049177 * A217890 A001003 A080243
Adjacent sequences: A217886 A217887 A217888 * A217890 A217891 A217892
KEYWORD
nonn
AUTHOR
R. H. Hardin Oct 14 2012
STATUS
approved

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Last modified October 5 01:23 EDT 2024. Contains 376527 sequences.
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