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A177611 Number of permutations of 3 copies of 1..n avoiding adjacent step pattern up, down, up, down, up 0
1, 19, 1446, 274821, 105551154, 71820303857, 79064800732654, 131813777765106241 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..8.

CROSSREFS

Sequence in context: A130037 A047910 A237429 * A051847 A217830 A002115

Adjacent sequences:  A177608 A177609 A177610 * A177612 A177613 A177614

KEYWORD

nonn

AUTHOR

R. H. Hardin May 10 2010

STATUS

approved

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Last modified November 22 03:39 EST 2019. Contains 329386 sequences. (Running on oeis4.)