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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.

A069812 a(n) = Sum_{k=1..n} (bigomega(k)-omega(k)).

Table of values

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

List of values

[0, 0, 0, 1, 1, 1, 1, 3, 4, 4, 4, 5, 5, 5, 5, 8, 8, 9, 9, 10, 10, 10, 10, 12, 13, 13, 15, 16, 16, 16, 16, 20, 20, 20, 20, 22, 22, 22, 22, 24, 24, 24, 24, 25, 26, 26, 26, 29, 30, 31, 31, 32, 32, 34, 34, 36, 36, 36, 36, 37, 37, 37, 38, 43, 43, 43, 43, 44, 44, 44, 44, 47, 47, 47, 48]

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