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.

A234638 Numbers n for which sigma(sigma(n)) is odd.

Table of values

n a(n)
1 1
2 3
3 7
4 10
5 17
6 21
7 22
8 30
9 31
10 46
11 51
12 52
13 55
14 66
15 70
16 71
17 81
18 93
19 94
20 97
21 106
22 115
23 119
24 127
25 138
26 154
27 156
28 165
29 170
30 199
31 210
32 213
33 214
34 217
35 232
36 235
37 241
38 253
39 265
40 282
41 291
42 298
43 310
44 318
45 322
46 337
47 343
48 345
49 357
50 364
51 374
52 381
53 382
54 385

List of values

[1, 3, 7, 10, 17, 21, 22, 30, 31, 46, 51, 52, 55, 66, 70, 71, 81, 93, 94, 97, 106, 115, 119, 127, 138, 154, 156, 165, 170, 199, 210, 213, 214, 217, 232, 235, 241, 253, 265, 282, 291, 298, 310, 318, 322, 337, 343, 345, 357, 364, 374, 381, 382, 385]