cp's OEIS Frontend

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.

A280243 Expansion of (Sum_{k>=2} floor(1/omega(k))*x^k)^3, where omega(k) is the number of distinct prime factors (A001221).

Table of values

n a(n)
0 0
1 0
2 0
3 0
4 0
5 0
6 1
7 3
8 6
9 10
10 12
11 15
12 19
13 24
14 30
15 34
16 36
17 39
18 45
19 45
20 51
21 52
22 57
23 66
24 67
25 66
26 69
27 73
28 75
29 87
30 81
31 87
32 93
33 94
34 99
35 111
36 111
37 126
38 129
39 130
40 123
41 141
42 126
43 156
44 138
45 150
46 132
47 168
48 145
49 168
50 153
51 172
52 165
53 195
54 156
55 189
56 171
57 202
58 177
59 228
60 165
61 225
62 183
63 225
64 186
65 243
66 177
67 243
68 204
69 238
70 198

List of values

[0, 0, 0, 0, 0, 0, 1, 3, 6, 10, 12, 15, 19, 24, 30, 34, 36, 39, 45, 45, 51, 52, 57, 66, 67, 66, 69, 73, 75, 87, 81, 87, 93, 94, 99, 111, 111, 126, 129, 130, 123, 141, 126, 156, 138, 150, 132, 168, 145, 168, 153, 172, 165, 195, 156, 189, 171, 202, 177, 228, 165, 225, 183, 225, 186, 243, 177, 243, 204, 238, 198]