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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.

A069217 Numbers n such that phi(n) + sigma(n) = n + reversal(n).

Table of values

n a(n)
1 1
2 2
3 3
4 5
5 7
6 11
7 101
8 131
9 151
10 181
11 191
12 313
13 353
14 373
15 383
16 727
17 757
18 787
19 797
20 919
21 929
22 10301
23 10501
24 10601
25 11311
26 11411
27 12421
28 12721
29 12821
30 13331
31 13831
32 13931
33 14341
34 14741
35 15451
36 15551
37 16061
38 16361
39 16561
40 16661
41 17471
42 17971
43 18181

List of values

[1, 2, 3, 5, 7, 11, 101, 131, 151, 181, 191, 313, 353, 373, 383, 727, 757, 787, 797, 919, 929, 10301, 10501, 10601, 11311, 11411, 12421, 12721, 12821, 13331, 13831, 13931, 14341, 14741, 15451, 15551, 16061, 16361, 16561, 16661, 17471, 17971, 18181]

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

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