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.

A279815 Numbers n such that the average of the squares of the numbers less than n that do not divide n is an integer.

Table of values

n a(n)
1 3
2 4
3 7
4 13
5 16
6 19
7 20
8 31
9 37
10 43
11 61
12 67
13 73
14 79
15 97
16 103
17 109
18 127
19 139
20 151
21 157
22 163
23 181
24 188
25 193
26 199
27 211
28 223
29 229
30 241
31 271
32 277
33 283
34 307
35 313
36 331
37 337
38 349
39 367
40 373
41 379
42 397
43 409
44 421
45 433
46 439
47 457
48 463
49 487
50 499
51 523
52 541
53 547
54 571
55 577
56 601
57 607
58 613
59 619
60 631
61 643
62 661
63 673
64 691
65 709
66 727
67 733
68 739
69 751
70 757
71 769
72 787

List of values

[3, 4, 7, 13, 16, 19, 20, 31, 37, 43, 61, 67, 73, 79, 97, 103, 109, 127, 139, 151, 157, 163, 181, 188, 193, 199, 211, 223, 229, 241, 271, 277, 283, 307, 313, 331, 337, 349, 367, 373, 379, 397, 409, 421, 433, 439, 457, 463, 487, 499, 523, 541, 547, 571, 577, 601, 607, 613, 619, 631, 643, 661, 673, 691, 709, 727, 733, 739, 751, 757, 769, 787]