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.

A104219 Triangle read by rows: T(n,k) is number of Schroeder paths of length 2n and having k peaks at height 1, for 0 <= k <= n.

Table of values

n a(n)
0 1
1 1
2 1
3 3
4 2
5 1
6 11
7 7
8 3
9 1
10 45
11 28
12 12
13 4
14 1
15 197
16 121
17 52
18 18
19 5
20 1
21 903
22 550
23 237
24 84
25 25
26 6
27 1
28 4279
29 2591
30 1119
31 403
32 125
33 33
34 7
35 1
36 20793
37 12536
38 5424
39 1976
40 630
41 176
42 42
43 8
44 1
45 103049
46 61921
47 26832
48 9860
49 3206
50 930
51 238
52 52
53 9
54 1
55 518859
56 310954
57 134913
58 49912

List of values

[1, 1, 1, 3, 2, 1, 11, 7, 3, 1, 45, 28, 12, 4, 1, 197, 121, 52, 18, 5, 1, 903, 550, 237, 84, 25, 6, 1, 4279, 2591, 1119, 403, 125, 33, 7, 1, 20793, 12536, 5424, 1976, 630, 176, 42, 8, 1, 103049, 61921, 26832, 9860, 3206, 930, 238, 52, 9, 1, 518859, 310954, 134913, 49912]