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A177644
Number of permutations of 4 copies of 1..n avoiding adjacent step pattern up, down, up, up
0
1, 70, 29874, 43724128, 163394718481, 1305717814847931, 19780733910930967382
(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: A005983 A200313 A177642 * A146499 A177649 A177651
Adjacent sequences: A177641 A177642 A177643 * A177645 A177646 A177647
KEYWORD
nonn
AUTHOR
R. H. Hardin May 10 2010
STATUS
approved

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Last modified December 2 02:09 EST 2024. Contains 378316 sequences.
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