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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.

A274113 Number of equivalence classes of ballot paths of length n for the string dud.

Table of values

n a(n)
0 1
1 1
2 1
3 1
4 2
5 3
6 5
7 7
8 11
9 16
10 26
11 39
12 63
13 95
14 154
15 235
16 381
17 585
18 948
19 1464
20 2373
21 3682
22 5967
23 9293
24 15060
25 23531
26 38131
27 59741
28 96801
29 152020
30 246310
31 387611
32 627985
33 990027
34 1603893
35 2532609
36 4102726
37 6487600
38 10509114
39 16639214
40 26952186
41 42722941
42 69199472

List of values

[1, 1, 1, 1, 2, 3, 5, 7, 11, 16, 26, 39, 63, 95, 154, 235, 381, 585, 948, 1464, 2373, 3682, 5967, 9293, 15060, 23531, 38131, 59741, 96801, 152020, 246310, 387611, 627985, 990027, 1603893, 2532609, 4102726, 6487600, 10509114, 16639214, 26952186, 42722941, 69199472]

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

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