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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.

A072114 Number of 3-almost primes (A014612) <= n.

Table of values

n a(n)
0 0
1 0
2 0
3 0
4 0
5 0
6 0
7 0
8 1
9 1
10 1
11 1
12 2
13 2
14 2
15 2
16 2
17 2
18 3
19 3
20 4
21 4
22 4
23 4
24 4
25 4
26 4
27 5
28 6
29 6
30 7
31 7
32 7
33 7
34 7
35 7
36 7
37 7
38 7
39 7
40 7
41 7
42 8
43 8
44 9
45 10
46 10
47 10
48 10
49 10
50 11
51 11
52 12
53 12
54 12
55 12
56 12
57 12
58 12
59 12
60 12
61 12
62 12
63 13
64 13
65 13
66 14
67 14
68 15
69 15
70 16
71 16
72 16
73 16
74 16
75 17
76 18
77 18
78 19
79 19
80 19
81 19
82 19
83 19
84 19

List of values

[0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 3, 3, 4, 4, 4, 4, 4, 4, 4, 5, 6, 6, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 8, 8, 9, 10, 10, 10, 10, 10, 11, 11, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 13, 13, 13, 14, 14, 15, 15, 16, 16, 16, 16, 16, 17, 18, 18, 19, 19, 19, 19, 19, 19, 19]

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