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A256161 Triangle of allowable Stirling numbers of the second kind a(n,k).

Table of values

n a(n)
1 1
2 1
3 1
4 1
5 2
6 1
7 1
8 3
9 4
10 1
11 1
12 4
13 11
14 6
15 1
16 1
17 5
18 26
19 23
20 9
21 1
22 1
23 6
24 57
25 72
26 50
27 12
28 1
29 1
30 7
31 120
32 201
33 222
34 86
35 16
36 1
37 1
38 8
39 247
40 522
41 867
42 480
43 150
44 20
45 1
46 1
47 9
48 502
49 1291
50 3123
51 2307
52 1080
53 230
54 25
55 1
56 1
57 10
58 1013
59 3084
60 10660
61 10044
62 6627
63 2000
64 355
65 30
66 1

List of values

[1, 1, 1, 1, 2, 1, 1, 3, 4, 1, 1, 4, 11, 6, 1, 1, 5, 26, 23, 9, 1, 1, 6, 57, 72, 50, 12, 1, 1, 7, 120, 201, 222, 86, 16, 1, 1, 8, 247, 522, 867, 480, 150, 20, 1, 1, 9, 502, 1291, 3123, 2307, 1080, 230, 25, 1, 1, 10, 1013, 3084, 10660, 10044, 6627, 2000, 355, 30, 1]