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A177672 Number of permutations of 4 copies of 1..n avoiding adjacent step pattern up, up, down, down, up, up 0
1, 70, 34470, 61633118, 290404848165, 2980163520882356, 58650349023599896052 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..7.

CROSSREFS

Sequence in context: A177668 A177673 A177661 * A177299 A266740 A177640

Adjacent sequences:  A177669 A177670 A177671 * A177673 A177674 A177675

KEYWORD

nonn

AUTHOR

R. H. Hardin May 10 2010

STATUS

approved

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Last modified April 26 09:52 EDT 2019. Contains 322472 sequences. (Running on oeis4.)