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.

A143494 Triangle read by rows: 2-Stirling numbers of the second kind.

Table of values

n a(n)
2 1
3 2
4 1
5 4
6 5
7 1
8 8
9 19
10 9
11 1
12 16
13 65
14 55
15 14
16 1
17 32
18 211
19 285
20 125
21 20
22 1
23 64
24 665
25 1351
26 910
27 245
28 27
29 1
30 128
31 2059
32 6069
33 5901
34 2380
35 434
36 35
37 1
38 256
39 6305
40 26335
41 35574
42 20181
43 5418
44 714
45 44
46 1
47 512
48 19171
49 111645
50 204205
51 156660
52 58107
53 11130
54 1110
55 54
56 1

List of values

[1, 2, 1, 4, 5, 1, 8, 19, 9, 1, 16, 65, 55, 14, 1, 32, 211, 285, 125, 20, 1, 64, 665, 1351, 910, 245, 27, 1, 128, 2059, 6069, 5901, 2380, 434, 35, 1, 256, 6305, 26335, 35574, 20181, 5418, 714, 44, 1, 512, 19171, 111645, 204205, 156660, 58107, 11130, 1110, 54, 1]

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

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