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.

A263863 Triangle read by rows: T(n,k) (n>=0, k>=n+1) is the number of posets with n elements and k chains.

Table of values

n a(n)
0 1
1 1
2 1
3 1
4 1
5 1
6 2
7 0
8 1
9 1
10 1
11 3
12 3
13 2
14 2
15 0
16 3
17 0
18 0
19 0
20 1
21 1
22 1
23 3
24 5
25 8
26 5
27 7
28 4
29 8
30 2
31 5
32 1
33 5
34 0
35 3
36 0
37 0
38 0
39 4
40 0
41 0
42 0
43 0
44 0
45 0
46 0
47 1

List of values

[1, 1, 1, 1, 1, 1, 2, 0, 1, 1, 1, 3, 3, 2, 2, 0, 3, 0, 0, 0, 1, 1, 1, 3, 5, 8, 5, 7, 4, 8, 2, 5, 1, 5, 0, 3, 0, 0, 0, 4, 0, 0, 0, 0, 0, 0, 0, 1]