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A243421
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Number of Dyck paths of semilength n having exactly 9 (possibly overlapping) occurrences of the consecutive steps UDUUDU (with U=(1,1), D=(1,-1)).
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2
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1, 21, 279, 2914, 25771, 201454, 1433041, 9469739, 59016909, 350829247, 2006522229, 11114963598, 59942608977, 316006164419, 1633786190804, 8305527032158, 41603804525306, 205707814621939, 1005426524364506, 4863626362504773, 23309223454202475, 110773290856066906
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OFFSET
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20,2
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LINKS
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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