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A177673 Number of permutations of 4 copies of 1..n avoiding adjacent step pattern up, up, down, up, down, down. 0
1, 70, 34290, 60635566, 281746189372, 2845828778331540, 55049107499751379058 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
LINKS
CROSSREFS
Sequence in context: A177655 A177663 A177668 * A177661 A177672 A177299
KEYWORD
nonn
AUTHOR
R. H. Hardin, May 10 2010
STATUS
approved

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Last modified March 29 02:15 EDT 2024. Contains 371264 sequences. (Running on oeis4.)