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A217888 Number of n element 1..n arrays with each element the minimum of 5 adjacent elements of a permutation of 1..n+4 of n+4 elements 0
1, 3, 11, 45, 197, 902, 4274, 20790, 103354, 523786, 2703206, 14210824, 76217372 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 5 of A217891

LINKS

Table of n, a(n) for n=1..13.

EXAMPLE

Some solutions for n=4

..1....2....4....1....2....1....2....1....4....1....3....1....3....1....1....3

..1....2....2....1....3....2....2....1....3....1....4....3....2....4....1....4

..1....3....1....3....3....2....2....3....2....4....2....2....1....3....2....1

..4....1....1....2....1....4....1....4....1....3....1....2....1....2....2....1

CROSSREFS

Sequence in context: A049186 A049160 A191243 * A146086 A049177 A217889

Adjacent sequences:  A217885 A217886 A217887 * A217889 A217890 A217891

KEYWORD

nonn

AUTHOR

R. H. Hardin Oct 14 2012

STATUS

approved

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Last modified January 22 05:11 EST 2019. Contains 319353 sequences. (Running on oeis4.)