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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.

A145396 a(n) = Sum_{d|n} sigma(d) + 3*Sum_{2c|n} sigma(c).

Table of values

n a(n)
1 1
2 7
3 5
4 23
5 7
6 35
7 9
8 59
9 18
10 49
11 13
12 115
13 15
14 63
15 35
16 135
17 19
18 126
19 21
20 161
21 45
22 91
23 25
24 295
25 38
26 105
27 58
28 207
29 31
30 245
31 33
32 291
33 65
34 133
35 63
36 414
37 39
38 147
39 75
40 413
41 43
42 315
43 45
44 299
45 126
46 175
47 49
48 675
49 66
50 266
51 95
52 345
53 55
54 406
55 91
56 531
57 105
58 217
59 61
60 805
61 63
62 231
63 162
64 607

List of values

[1, 7, 5, 23, 7, 35, 9, 59, 18, 49, 13, 115, 15, 63, 35, 135, 19, 126, 21, 161, 45, 91, 25, 295, 38, 105, 58, 207, 31, 245, 33, 291, 65, 133, 63, 414, 39, 147, 75, 413, 43, 315, 45, 299, 126, 175, 49, 675, 66, 266, 95, 345, 55, 406, 91, 531, 105, 217, 61, 805, 63, 231, 162, 607]

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

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