A177669 - OEIS

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A177669

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

1, 70, 33261, 56506806, 250834987380, 2414371474673571, 44451152905883329021

(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: A177651 A177645 A177662 * A177667 A177650 A177655

Adjacent sequences: A177666 A177667 A177668 * A177670 A177671 A177672

KEYWORD

nonn

AUTHOR

R. H. Hardin May 10 2010

STATUS

approved