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.

A248963 Prime powers p^m for which sigma(p^2m) is not prime.

Table of values

n a(n)
1 1
2 7
3 9
4 11
5 13
6 16
7 19
8 23
9 25
10 29
11 31
12 32
13 37
14 43
15 47
16 53
17 61
18 67
19 73
20 79
21 81
22 83
23 97
24 103
25 107
26 109
27 113
28 121
29 127
30 128
31 137
32 139
33 149
34 151
35 157
36 163
37 179
38 181
39 191
40 193
41 197
42 199
43 211
44 223
45 227
46 229
47 233
48 239
49 241
50 243
51 251
52 257
53 263
54 269
55 271
56 277
57 281
58 283
59 307
60 311
61 313
62 317
63 331

List of values

[1, 7, 9, 11, 13, 16, 19, 23, 25, 29, 31, 32, 37, 43, 47, 53, 61, 67, 73, 79, 81, 83, 97, 103, 107, 109, 113, 121, 127, 128, 137, 139, 149, 151, 157, 163, 179, 181, 191, 193, 197, 199, 211, 223, 227, 229, 233, 239, 241, 243, 251, 257, 263, 269, 271, 277, 281, 283, 307, 311, 313, 317, 331]