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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.

A306069 Partial sums of A286324: Sum_{k=1..n} bd(k) where bd(k) is the number of bi-unitary divisors of k.

Table of values

n a(n)
1 1
2 3
3 5
4 7
5 9
6 13
7 15
8 19
9 21
10 25
11 27
12 31
13 33
14 37
15 41
16 45
17 47
18 51
19 53
20 57
21 61
22 65
23 67
24 75
25 77
26 81
27 85
28 89
29 91
30 99
31 101
32 107
33 111
34 115
35 119
36 123
37 125
38 129
39 133
40 141
41 143
42 151
43 153
44 157
45 161
46 165
47 167
48 175
49 177
50 181
51 185
52 189
53 191
54 199
55 203
56 211
57 215
58 219
59 221

List of values

[1, 3, 5, 7, 9, 13, 15, 19, 21, 25, 27, 31, 33, 37, 41, 45, 47, 51, 53, 57, 61, 65, 67, 75, 77, 81, 85, 89, 91, 99, 101, 107, 111, 115, 119, 123, 125, 129, 133, 141, 143, 151, 153, 157, 161, 165, 167, 175, 177, 181, 185, 189, 191, 199, 203, 211, 215, 219, 221]

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

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