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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.

A249615 Number of non-singleton blocks in the n-th set partition (A231428).

Table of values

n a(n)
0 0
1 1
2 1
3 1
4 1
5 1
6 2
7 1
8 2
9 1
10 1
11 2
12 1
13 1
14 1
15 1
16 2
17 2
18 2
19 2
20 1
21 2
22 2
23 2
24 2
25 1
26 2
27 1
28 2
29 2
30 2
31 2
32 1
33 2
34 1
35 2
36 1
37 1
38 2
39 2
40 2
41 2
42 1
43 2
44 1
45 2
46 1
47 1
48 2
49 1
50 1
51 1
52 1
53 2
54 2
55 2
56 2
57 2
58 3
59 2
60 3
61 2
62 2
63 3
64 2
65 2
66 2
67 1
68 2
69 2
70 2
71 2
72 2
73 3
74 2
75 3
76 2
77 2
78 3
79 2
80 2
81 2

List of values

[0, 1, 1, 1, 1, 1, 2, 1, 2, 1, 1, 2, 1, 1, 1, 1, 2, 2, 2, 2, 1, 2, 2, 2, 2, 1, 2, 1, 2, 2, 2, 2, 1, 2, 1, 2, 1, 1, 2, 2, 2, 2, 1, 2, 1, 2, 1, 1, 2, 1, 1, 1, 1, 2, 2, 2, 2, 2, 3, 2, 3, 2, 2, 3, 2, 2, 2, 1, 2, 2, 2, 2, 2, 3, 2, 3, 2, 2, 3, 2, 2, 2]

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