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A135307
Number of Dyck paths of semilength n that do not contain the string UDDU.
+0
2
1, 1, 2, 4, 9, 23, 63, 178, 514, 1515, 4545, 13827, 42540, 132124, 413741, 1304891, 4141198, 13214815, 42375461, 136478383, 441285890, 1431925180, 4661485203, 15219836738, 49827678840, 163535624722, 537962562453, 1773437280323
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Maintained by
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Last modified December 16 17:18 EST 2009. Contains 170825 sequences.
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