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.

A320513 Squarefree k > 1 with sigma(sigma(sigma(k))) < 3*k + 1.

Table of values

n a(n)
1 3
2 97
3 217
4 241
5 337
6 577
7 889
8 1249
9 1393
10 1501
11 3361
12 3697
13 3937
14 4039
15 4801
16 5587
17 6961
18 7471
19 8191
20 9481
21 10657
22 14449
23 16177
24 16561
25 17887
26 18049
27 18157
28 22459
29 23527
30 23761
31 24301
32 25273
33 25537
34 29617
35 29977
36 30607
37 31249
38 32257
39 33607
40 37537
41 37981

List of values

[3, 97, 217, 241, 337, 577, 889, 1249, 1393, 1501, 3361, 3697, 3937, 4039, 4801, 5587, 6961, 7471, 8191, 9481, 10657, 14449, 16177, 16561, 17887, 18049, 18157, 22459, 23527, 23761, 24301, 25273, 25537, 29617, 29977, 30607, 31249, 32257, 33607, 37537, 37981]