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.

A131906 Smallest positive integer k with the same sum of squares of divisors as the n-th integer for which such a k exists.

Table of values

n a(n)
1 6
2 24
3 30
4 40
5 66
6 78
7 102
8 120
9 114
10 120
11 136
12 138
13 150
14 168
15 174
16 186
17 186
18 230
19 222
20 280
21 264
22 246
23 258
24 280
25 318
26 330
27 354
28 360
29 366
30 430
31 408
32 390
33 402
34 408
35 456
36 426
37 438
38 440
39 474
40 498
41 510
42 552
43 520
44 534
45 600
46 645
47 570
48 582
49 606
50 618
51 642
52 696
53 654
54 680

List of values

[6, 24, 30, 40, 66, 78, 102, 120, 114, 120, 136, 138, 150, 168, 174, 186, 186, 230, 222, 280, 264, 246, 258, 280, 318, 330, 354, 360, 366, 430, 408, 390, 402, 408, 456, 426, 438, 440, 474, 498, 510, 552, 520, 534, 600, 645, 570, 582, 606, 618, 642, 696, 654, 680]

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

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