cp's OEIS Frontend

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.

A128747 Triangle read by rows: T(n,k) is the number of skew Dyck paths of semilength n and having k peaks of height >1 (n >= 1; 0 <= k <= n-1).

Table of values

n a(n)
1 1
2 1
3 2
4 1
5 7
6 2
7 1
8 18
9 15
10 2
11 1
12 41
13 68
14 25
15 2
16 1
17 88
18 244
19 171
20 37
21 2
22 1
23 183
24 765
25 866
26 351
27 51
28 2
29 1
30 374
31 2199
32 3651
33 2355
34 636
35 67
36 2
37 1
38 757
39 5954
40 13601
41 12708
42 5421
43 1058
44 85
45 2
46 1
47 1524
48 15438
49 46355
50 58977
51 36198
52 11116
53 1653
54 105
55 2
56 1
57 3059
58 38747
59 147768

List of values

[1, 1, 2, 1, 7, 2, 1, 18, 15, 2, 1, 41, 68, 25, 2, 1, 88, 244, 171, 37, 2, 1, 183, 765, 866, 351, 51, 2, 1, 374, 2199, 3651, 2355, 636, 67, 2, 1, 757, 5954, 13601, 12708, 5421, 1058, 85, 2, 1, 1524, 15438, 46355, 58977, 36198, 11116, 1653, 105, 2, 1, 3059, 38747, 147768]