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.

A353807 Numbers k such that A353802(k) / sigma(sigma(k)) is an integer > 1, where A353802(n) = Product_{p^e||n} sigma(sigma(p^e)).

Table of values

n a(n)
1 1819
2 5088
3 7215
4 7276
5 9487
6 9523
7 11895
8 13303
9 14235
10 16371
11 20179
12 21079
13 21255
14 24531
15 24751
16 24931
17 25824
18 29104
19 30615
20 32224
21 33855
22 36199
23 37635
24 37948
25 38092
26 38664
27 40443
28 40515
29 41847
30 43831
31 44655
32 45475
33 45695
34 45883
35 46995
36 48043
37 48399
38 53835
39 54015
40 54568
41 55747
42 56899
43 56928
44 59599
45 60495
46 61035

List of values

[1819, 5088, 7215, 7276, 9487, 9523, 11895, 13303, 14235, 16371, 20179, 21079, 21255, 24531, 24751, 24931, 25824, 29104, 30615, 32224, 33855, 36199, 37635, 37948, 38092, 38664, 40443, 40515, 41847, 43831, 44655, 45475, 45695, 45883, 46995, 48043, 48399, 53835, 54015, 54568, 55747, 56899, 56928, 59599, 60495, 61035]