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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.

A019538 Triangle of numbers T(n,k) = k!*Stirling2(n,k) read by rows (n >= 1, 1 <= k <= n).

Table of values

n a(n)
1 1
2 1
3 2
4 1
5 6
6 6
7 1
8 14
9 36
10 24
11 1
12 30
13 150
14 240
15 120
16 1
17 62
18 540
19 1560
20 1800
21 720
22 1
23 126
24 1806
25 8400
26 16800
27 15120
28 5040
29 1
30 254
31 5796
32 40824
33 126000
34 191520
35 141120
36 40320
37 1
38 510
39 18150
40 186480
41 834120
42 1905120
43 2328480
44 1451520
45 362880
46 1
47 1022
48 55980
49 818520
50 5103000
51 16435440
52 29635200
53 30240000
54 16329600
55 3628800

List of values

[1, 1, 2, 1, 6, 6, 1, 14, 36, 24, 1, 30, 150, 240, 120, 1, 62, 540, 1560, 1800, 720, 1, 126, 1806, 8400, 16800, 15120, 5040, 1, 254, 5796, 40824, 126000, 191520, 141120, 40320, 1, 510, 18150, 186480, 834120, 1905120, 2328480, 1451520, 362880, 1, 1022, 55980, 818520, 5103000, 16435440, 29635200, 30240000, 16329600, 3628800]

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

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