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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.

A259252 Numbers n such that 1 + sigma(n) + sigma(n)^2 + sigma(n)^3 + sigma(n)^4 + sigma(n)^5 + sigma(n)^6 is prime.

Table of values

n a(n)
1 1
2 2
3 5
4 9
5 13
6 16
7 24
8 25
9 27
10 28
11 30
12 37
13 38
14 39
15 46
16 50
17 51
18 55
19 57
20 59
21 67
22 68
23 71
24 79
25 80
26 82
27 88
28 93
29 99
30 105
31 108
32 118
33 122
34 125
35 127
36 133
37 141
38 145
39 148
40 152
41 155
42 157
43 161
44 162
45 164
46 179
47 189
48 191
49 194
50 196
51 215
52 228
53 232
54 237
55 242
56 247
57 263
58 281

List of values

[1, 2, 5, 9, 13, 16, 24, 25, 27, 28, 30, 37, 38, 39, 46, 50, 51, 55, 57, 59, 67, 68, 71, 79, 80, 82, 88, 93, 99, 105, 108, 118, 122, 125, 127, 133, 141, 145, 148, 152, 155, 157, 161, 162, 164, 179, 189, 191, 194, 196, 215, 228, 232, 237, 242, 247, 263, 281]

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

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