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A177474 Avoiding the pattern 121'3. To avoid 121'3 means not to have four consecutive letters such that the first letter and the third one is less than the second and the fourth letter and the second one is less than and the fourth one. 3
1, 2, 6, 20, 83, 411, 2290, 14588, 104448 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
LINKS
S. Kitaev, Introduction to partially ordered patterns, Discrete Applied Mathematics 155 (2007), 929-944.
CROSSREFS
Sequence in context: A115084 A177476 A266600 * A177480 A365229 A089179
KEYWORD
nonn,more
AUTHOR
Signy Olafsdottir (signy06(AT)ru.is), May 09 2010
STATUS
approved

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Last modified June 13 03:56 EDT 2024. Contains 373366 sequences. (Running on oeis4.)