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.

A225110 Numbers m such that S = Sum_{i = 1..q} 1/d(i) is an integer where d(i) are the divisors of m in increasing order, and q the smallest integer 1 < q <= tau(m) for m > 1; and a(1) = 1.

Table of values

n a(n)
1 1
2 6
3 18
4 28
5 42
6 54
7 66
8 78
9 102
10 114
11 120
12 126
13 138
14 162
15 174
16 180
17 186
18 196
19 198
20 222
21 234
22 246
23 258
24 282
25 294
26 306
27 318
28 342
29 354
30 366
31 378
32 402
33 414
34 426
35 438
36 462
37 474
38 486
39 496
40 498
41 522
42 534
43 546
44 558
45 582
46 594
47 606
48 618
49 642
50 654
51 666
52 672
53 678
54 702
55 714

List of values

[1, 6, 18, 28, 42, 54, 66, 78, 102, 114, 120, 126, 138, 162, 174, 180, 186, 196, 198, 222, 234, 246, 258, 282, 294, 306, 318, 342, 354, 366, 378, 402, 414, 426, 438, 462, 474, 486, 496, 498, 522, 534, 546, 558, 582, 594, 606, 618, 642, 654, 666, 672, 678, 702, 714]

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

Content is available under The OEIS End-User License Agreement.