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.

A319182 Irregular triangle where T(n,k) is the number of set partitions of {1,...,n} with block-sizes given by the integer partition with Heinz number A215366(n,k).

Table of values

n a(n)
1 1
2 1
3 1
4 1
5 3
6 1
7 1
8 3
9 4
10 6
11 1
12 1
13 5
14 10
15 15
16 10
17 10
18 1
19 1
20 15
21 6
22 10
23 15
24 15
25 60
26 45
27 20
28 15
29 1
30 1
31 7
32 21
33 35
34 105
35 21
36 105
37 70
38 105
39 35
40 210
41 105
42 35
43 21
44 1
45 1
46 8
47 28
48 35
49 28
50 56
51 210
52 168
53 280
54 280
55 105
56 420
57 56
58 840
59 280
60 420
61 70
62 560
63 210
64 56
65 28
66 1
67 1

List of values

[1, 1, 1, 1, 3, 1, 1, 3, 4, 6, 1, 1, 5, 10, 15, 10, 10, 1, 1, 15, 6, 10, 15, 15, 60, 45, 20, 15, 1, 1, 7, 21, 35, 105, 21, 105, 70, 105, 35, 210, 105, 35, 21, 1, 1, 8, 28, 35, 28, 56, 210, 168, 280, 280, 105, 420, 56, 840, 280, 420, 70, 560, 210, 56, 28, 1, 1]

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

Content is available under The OEIS End-User License Agreement.