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.

A386424 Numbers k such that sigma(k) has the same powerful part as k, where sigma is the sum of divisors function.

Table of values

n a(n)
1 1
2 2
3 5
4 12
5 13
6 26
7 29
8 37
9 41
10 44
11 56
12 61
13 73
14 74
15 76
16 90
17 101
18 109
19 113
20 122
21 137
22 146
23 153
24 157
25 172
26 173
27 181
28 193
29 218
30 229
31 236
32 257
33 268
34 277
35 281
36 312
37 313
38 314
39 317
40 353
41 362
42 373
43 386
44 389
45 397
46 401
47 409
48 421
49 433
50 457
51 458
52 461
53 509
54 522
55 524
56 528
57 541
58 554
59 560
60 569
61 601
62 613
63 617
64 626
65 641
66 652
67 653

List of values

[1, 2, 5, 12, 13, 26, 29, 37, 41, 44, 56, 61, 73, 74, 76, 90, 101, 109, 113, 122, 137, 146, 153, 157, 172, 173, 181, 193, 218, 229, 236, 257, 268, 277, 281, 312, 313, 314, 317, 353, 362, 373, 386, 389, 397, 401, 409, 421, 433, 457, 458, 461, 509, 522, 524, 528, 541, 554, 560, 569, 601, 613, 617, 626, 641, 652, 653]