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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.

A171895 Number of distinct terms among the first n terms of A181391.

Table of values

n a(n)
1 1
2 1
3 2
4 2
5 3
6 3
7 3
8 3
9 3
10 4
11 4
12 5
13 5
14 5
15 5
16 5
17 6
18 6
19 6
20 7
21 7
22 7
23 7
24 8
25 8
26 8
27 8
28 8
29 8
30 9
31 9
32 9
33 9
34 9
35 10
36 10
37 10
38 10
39 10
40 10
41 11
42 11
43 11
44 12
45 12
46 12
47 13
48 13
49 13
50 13
51 13
52 14
53 14
54 14
55 14
56 15
57 15
58 15
59 16
60 16
61 16
62 16
63 17
64 17
65 17
66 18
67 18
68 18
69 18
70 18
71 18
72 19
73 19
74 19
75 19
76 19
77 19
78 19
79 19
80 19
81 20
82 20
83 20

List of values

[1, 1, 2, 2, 3, 3, 3, 3, 3, 4, 4, 5, 5, 5, 5, 5, 6, 6, 6, 7, 7, 7, 7, 8, 8, 8, 8, 8, 8, 9, 9, 9, 9, 9, 10, 10, 10, 10, 10, 10, 11, 11, 11, 12, 12, 12, 13, 13, 13, 13, 13, 14, 14, 14, 14, 15, 15, 15, 16, 16, 16, 16, 17, 17, 17, 18, 18, 18, 18, 18, 18, 19, 19, 19, 19, 19, 19, 19, 19, 19, 20, 20, 20]

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