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A243416 Number of Dyck paths of semilength n having exactly 4 (possibly overlapping) occurrences of the consecutive steps UDUUDU (with U=(1,1), D=(1,-1)). 2
1, 11, 79, 474, 2561, 12937, 62524, 293146, 1344602, 6065734, 27007870, 118984043, 519589872, 2252141576, 9699519424, 41541816291, 177048628294, 751293699026, 3175665502731, 13376228005419, 56162636663430, 235124074987923, 981718571224412, 4088916793922566 (list; graph; refs; listen; history; text; internal format)
OFFSET
10,2
LINKS
CROSSREFS
Column k=4 of A243366.
Sequence in context: A026841 A026848 A026864 * A101028 A125348 A337929
KEYWORD
nonn
AUTHOR
Alois P. Heinz, Jun 04 2014
STATUS
approved

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Last modified July 18 21:02 EDT 2024. Contains 374388 sequences. (Running on oeis4.)