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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.

A087180 Number partition numbers <= P(n) of the form 3*k (P = A000041).

Table of values

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

List of values

[0, 0, 0, 1, 1, 1, 1, 2, 2, 3, 4, 4, 4, 4, 5, 5, 6, 7, 7, 7, 8, 9, 10, 10, 11, 11, 12, 12, 12, 12, 13, 13, 14, 15, 15, 16, 16, 16, 16, 17, 18, 19, 19, 20, 20, 20, 21, 21, 22, 22, 22, 23, 24, 25, 25, 25, 25, 26, 26, 26, 26, 27, 27, 28, 28, 28, 28, 28, 29, 29, 30, 31, 31, 31, 31, 32]

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