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A177647 Number of permutations of 4 copies of 1..n avoiding adjacent step pattern up, down, down, down, down. 0
1, 1, 70, 34650, 63063000, 303526299000, 3187068420047305, 64239844119903312514 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,3
LINKS
CROSSREFS
Cf. A014608.
Sequence in context: A177300 A266741 A177646 * A177658 A177670 A177671
KEYWORD
nonn
AUTHOR
R. H. Hardin, May 10 2010
STATUS
approved

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Last modified March 29 10:22 EDT 2024. Contains 371268 sequences. (Running on oeis4.)