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.

A244974 Sum of numbers m <= n whose set of prime divisors is a subset of the set of prime divisors of n.

Table of values

n a(n)
1 1
2 3
3 4
4 7
5 6
6 16
7 8
8 15
9 13
10 30
11 12
12 45
13 14
14 36
15 33
16 31
17 18
18 79
19 20
20 66
21 41
22 64
23 24
24 103
25 31
26 70
27 40
28 80
29 30
30 235
31 32
32 63
33 84
34 114
35 73
36 198
37 38
38 120
39 92
40 163
41 42
42 310
43 44
44 140
45 130
46 132
47 48
48 246
49 57
50 213
51 108
52 154
53 54
54 300
55 97
56 217
57 116
58 150
59 60
60 600
61 62
62 156
63 180
64 127
65 109
66 540
67 68
68 246

List of values

[1, 3, 4, 7, 6, 16, 8, 15, 13, 30, 12, 45, 14, 36, 33, 31, 18, 79, 20, 66, 41, 64, 24, 103, 31, 70, 40, 80, 30, 235, 32, 63, 84, 114, 73, 198, 38, 120, 92, 163, 42, 310, 44, 140, 130, 132, 48, 246, 57, 213, 108, 154, 54, 300, 97, 217, 116, 150, 60, 600, 62, 156, 180, 127, 109, 540, 68, 246]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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