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.

A336357 Numbers k such that sigma(k) has fewer distinct prime factors than k.

Table of values

n a(n)
1 21
2 30
3 42
4 66
5 70
6 84
7 93
8 102
9 105
10 110
11 138
12 154
13 156
14 165
15 170
16 186
17 210
18 217
19 230
20 231
21 238
22 255
23 273
24 282
25 310
26 318
27 322
28 330
29 336
30 345
31 357
32 364
33 372
34 374
35 381
36 385
37 390
38 399
39 400
40 420
41 426
42 434
43 462
44 465
45 470
46 483
47 506
48 510
49 525
50 530
51 546
52 561
53 570
54 595
55 630
56 642
57 651
58 658
59 660
60 682
61 690
62 705
63 710
64 714

List of values

[21, 30, 42, 66, 70, 84, 93, 102, 105, 110, 138, 154, 156, 165, 170, 186, 210, 217, 230, 231, 238, 255, 273, 282, 310, 318, 322, 330, 336, 345, 357, 364, 372, 374, 381, 385, 390, 399, 400, 420, 426, 434, 462, 465, 470, 483, 506, 510, 525, 530, 546, 561, 570, 595, 630, 642, 651, 658, 660, 682, 690, 705, 710, 714]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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