A243420 Number of Dyck paths of semilength n having exactly 8 (possibly overlapping) occurrences of the consecutive steps UDUUDU (with U=(1,1), D=(1,-1)).

1, 19, 229, 2184, 17759, 128509, 851831, 5278129, 31020976, 174803309, 952033480, 5042006351, 26087126992, 132340281386, 660143136637, 3245280843311, 15751929981822, 75602686035094, 359256881535197, 1691965976395069, 7904617778358794, 36660673151053000

Offset

18,2

Links

Alois P. Heinz, Table of n, a(n) for n = 18..550

Crossrefs

Column k=8 of A243366.

Sequence in context: A087607 A041688 A140843 * A125431 A104116 A028026

Adjacent sequences: A243417 A243418 A243419 * A243421 A243422 A243423

Keyword

nonn

Author

Alois P. Heinz, Jun 04 2014

Status

approved