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.

A237289 Sum of positive numbers k <= sigma(n) that are not a sum of any subset of distinct divisors of n.

Table of values

n a(n)
1 0
2 0
3 2
4 0
5 9
6 0
7 20
8 0
9 39
10 27
11 54
12 0
13 77
14 108
15 108
16 0
17 135
18 0
19 170
20 0
21 272
22 378
23 252
24 0
25 372
26 567
27 500
28 0
29 405
30 0
31 464
32 0
33 792
34 1053
35 792
36 0
37 665
38 1350
39 1148
40 0
41 819
42 0
43 902
44 882
45 897
46 2052
47 1080
48 0
49 1425
50 1395
51 2052
52 1715
53 1377
54 0
55 2052
56 0
57 2600
58 3375
59 1710

List of values

[0, 0, 2, 0, 9, 0, 20, 0, 39, 27, 54, 0, 77, 108, 108, 0, 135, 0, 170, 0, 272, 378, 252, 0, 372, 567, 500, 0, 405, 0, 464, 0, 792, 1053, 792, 0, 665, 1350, 1148, 0, 819, 0, 902, 882, 897, 2052, 1080, 0, 1425, 1395, 2052, 1715, 1377, 0, 2052, 0, 2600, 3375, 1710]