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A177611
Number of permutations of 3 copies of 1..n avoiding adjacent step pattern up, down, up, down, up
0
1, 19, 1446, 274821, 105551154, 71820303857, 79064800732654, 131813777765106241
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OFFSET
1,2
LINKS
Table of n, a(n) for n=1..8.
CROSSREFS
Sequence in context:
A047910
A357230
A237429
*
A051847
A217830
A002115
Adjacent sequences:
A177608
A177609
A177610
*
A177612
A177613
A177614
KEYWORD
nonn
AUTHOR
R. H. Hardin
May 10 2010
STATUS
approved
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Last modified March 19 08:32 EDT 2024. Contains 370962 sequences. (Running on oeis4.)