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This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A243417 Number of Dyck paths of semilength n having exactly 5 (possibly overlapping) occurrences of the consecutive steps UDUUDU (with U=(1,1), D=(1,-1)).

Table of values

n a(n)
12 1
13 13
14 109
15 748
16 4531
17 25228
18 132515
19 667747
20 3263146
21 15576803
22 72995158
23 336986263
24 1536565549
25 6933515253
26 31007787862
27 137599702886
28 606467289880
29 2656919897648
30 11577389890752
31 50204031478108
32 216750954307831
33 932068704988570
34 3993428974519241

List of values

[1, 13, 109, 748, 4531, 25228, 132515, 667747, 3263146, 15576803, 72995158, 336986263, 1536565549, 6933515253, 31007787862, 137599702886, 606467289880, 2656919897648, 11577389890752, 50204031478108, 216750954307831, 932068704988570, 3993428974519241]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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