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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.

A144586 a(n) = odd and nonprime sum (with multiplicity) of prime factors of composite(k) = A002808(k).

Table of values

n a(n)
1 9
2 9
3 9
4 15
5 9
6 21
7 15
8 25
9 33
10 21
11 39
12 45
13 27
14 49
15 15
16 55
17 15
18 33
19 63
20 35
21 15
22 15
23 69
24 75
25 15
26 25
27 81
28 15
29 45
30 85
31 25
32 91
33 15
34 51
35 15
36 99
37 21
38 105
39 21
40 57
41 15
42 111
43 115
44 21
45 35
46 21
47 63
48 15
49 65
50 129
51 25
52 35
53 133
54 25
55 21
56 141
57 75
58 27
59 77
60 153
61 27
62 25
63 159
64 165
65 21
66 87
67 169
68 27

List of values

[9, 9, 9, 15, 9, 21, 15, 25, 33, 21, 39, 45, 27, 49, 15, 55, 15, 33, 63, 35, 15, 15, 69, 75, 15, 25, 81, 15, 45, 85, 25, 91, 15, 51, 15, 99, 21, 105, 21, 57, 15, 111, 115, 21, 35, 21, 63, 15, 65, 129, 25, 35, 133, 25, 21, 141, 75, 27, 77, 153, 27, 25, 159, 165, 21, 87, 169, 27]

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

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