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A177595 Number of permutations of 3 copies of 1..n avoiding adjacent step pattern up, down. 0
1, 10, 238, 10588, 779092, 87126856, 13960372312, 3064747884400, 890409817619536, 332982388081862176 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..10.

CROSSREFS

Sequence in context: A268080 A096331 A159497 * A013922 A215835 A006423

Adjacent sequences:  A177592 A177593 A177594 * A177596 A177597 A177598

KEYWORD

nonn

AUTHOR

R. H. Hardin, May 10 2010

EXTENSIONS

a(10) from Alois P. Heinz, Oct 22 2013

STATUS

approved

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Last modified August 6 19:52 EDT 2020. Contains 336256 sequences. (Running on oeis4.)