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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.

A191794 Number of length n left factors of Dyck paths having no UUDD's; here U=(1,1) and D=(1,-1).

Table of values

n a(n)
0 1
1 1
2 2
3 3
4 5
5 8
6 14
7 23
8 41
9 69
10 124
11 212
12 383
13 662
14 1200
15 2091
16 3799
17 6661
18 12122
19 21359
20 38919
21 68850
22 125578
23 222892
24 406865
25 724175
26 1322772
27 2360010
28 4313155
29 7711148
30 14099524
31 25252819
32 46192483
33 82863807
34 151628090
35 272385447
36 498578411
37 896774552

List of values

[1, 1, 2, 3, 5, 8, 14, 23, 41, 69, 124, 212, 383, 662, 1200, 2091, 3799, 6661, 12122, 21359, 38919, 68850, 125578, 222892, 406865, 724175, 1322772, 2360010, 4313155, 7711148, 14099524, 25252819, 46192483, 82863807, 151628090, 272385447, 498578411, 896774552]

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

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