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.

A350772 Triangle read by rows: T(n,k) is the number of n-element unlabeled series-parallel posets with k connected components.

Table of values

n a(n)
1 1
2 1
3 1
4 3
5 1
6 1
7 9
8 4
9 1
10 1
11 30
12 12
13 4
14 1
15 1
16 103
17 45
18 13
19 4
20 1
21 1
22 375
23 160
24 48
25 13
26 4
27 1
28 1
29 1400
30 613
31 175
32 49
33 13
34 4
35 1
36 1
37 5380
38 2354
39 680
40 178
41 49
42 13
43 4
44 1
45 1

List of values

[1, 1, 1, 3, 1, 1, 9, 4, 1, 1, 30, 12, 4, 1, 1, 103, 45, 13, 4, 1, 1, 375, 160, 48, 13, 4, 1, 1, 1400, 613, 175, 49, 13, 4, 1, 1, 5380, 2354, 680, 178, 49, 13, 4, 1, 1]