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A177670
Number of permutations of 4 copies of 1..n avoiding adjacent step pattern up, down, up, up, up, up.
0
1, 1, 70, 34650, 63063000, 304532310180, 3216303433012890, 65316931455144717352
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OFFSET
0,3
LINKS
Table of n, a(n) for n=0..7.
CROSSREFS
Cf.
A014608
.
Sequence in context:
A177646
A177647
A177658
*
A177671
A177656
A177657
Adjacent sequences:
A177667
A177668
A177669
*
A177671
A177672
A177673
KEYWORD
nonn
AUTHOR
R. H. Hardin
, May 10 2010
STATUS
approved
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Last modified July 21 04:02 EDT 2024. Contains 374463 sequences. (Running on oeis4.)