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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.

A065148 Nonprimes m such that phi(m)*sigma(m) is divisible by m+1.

Table of values

n a(n)
1 15
2 20
3 35
4 95
5 104
6 143
7 207
8 255
9 287
10 319
11 323
12 464
13 539
14 650
15 890
16 899
17 1023
18 1034
19 1199
20 1295
21 1349
22 1407
23 1519
24 1763
25 1952
26 2015
27 2204
28 2834
29 2975
30 3599
31 4031
32 4454
33 4607
34 5183
35 6479
36 9215
37 9503
38 9799
39 10403
40 11339
41 11663
42 12095
43 12824
44 13055

List of values

[15, 20, 35, 95, 104, 143, 207, 255, 287, 319, 323, 464, 539, 650, 890, 899, 1023, 1034, 1199, 1295, 1349, 1407, 1519, 1763, 1952, 2015, 2204, 2834, 2975, 3599, 4031, 4454, 4607, 5183, 6479, 9215, 9503, 9799, 10403, 11339, 11663, 12095, 12824, 13055]

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

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