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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.

A067229 Numbers n such that phi(2n+1) = sigma(n).

Table of values

n a(n)
1 6
2 7
3 27
4 38
5 55
6 85
7 87
8 127
9 188
10 236
11 255
12 266
13 445
14 451
15 655
16 717
17 913
18 1309
19 1357
20 1490
21 1947
22 2095
23 2515
24 2726
25 3002
26 3247
27 3289
28 4117
29 4237
30 5071
31 5605
32 7195
33 8924
34 12128
35 12625
36 12771
37 12837
38 13190
39 13795
40 15835
41 16197
42 16748
43 17997
44 20257

List of values

[6, 7, 27, 38, 55, 85, 87, 127, 188, 236, 255, 266, 445, 451, 655, 717, 913, 1309, 1357, 1490, 1947, 2095, 2515, 2726, 3002, 3247, 3289, 4117, 4237, 5071, 5605, 7195, 8924, 12128, 12625, 12771, 12837, 13190, 13795, 15835, 16197, 16748, 17997, 20257]

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

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