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A177472
Avoiding the pattern 11'2'2.To avoid 11'2'2 means not to have four consecutive letters such that the first letter is less than the last one and the second letter is less than the third one.
3
1, 2, 6, 18, 71, 322, 1665, 9789, 64327
(list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
LINKS
Table of n, a(n) for n=1..9.
S. Kitaev, Introduction to partially ordered patterns, Discrete Applied Mathematics 155 (2007), 929-944.
CROSSREFS
Sequence in context: A131281 A264036 A261994 * A364849 A194088 A022491
Adjacent sequences: A177469 A177470 A177471 * A177473 A177474 A177475
KEYWORD
nonn,more
AUTHOR
Signy Olafsdottir (signy06(AT)ru.is), May 09 2010
STATUS
approved

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Last modified September 27 09:57 EDT 2024. Contains 376259 sequences.
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