A177652 - OEIS

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A177652

Number of permutations of 4 copies of 1..n avoiding adjacent step pattern up, down, up, down, up

1, 65, 27707, 41243158, 159108376040, 1325880163281871, 21089698925887652590

(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: A355469 A084225 A278550 * A278795 A289946 A219564

Adjacent sequences: A177649 A177650 A177651 * A177653 A177654 A177655

KEYWORD

nonn

AUTHOR

R. H. Hardin May 10 2010

STATUS

approved