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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.

A249505 Primes p such that p+1 is a totient (i.e., in A000010).

Table of values

n a(n)
1 3
2 5
3 7
4 11
5 17
6 19
7 23
8 29
9 31
10 41
11 43
12 47
13 53
14 59
15 71
16 79
17 83
18 101
19 103
20 107
21 109
22 127
23 131
24 137
25 139
26 149
27 163
28 167
29 179
30 191
31 197
32 199
33 211
34 223
35 227
36 239
37 251
38 263
39 269
40 271
41 281
42 293
43 311
44 331
45 347
46 359
47 367
48 379
49 383
50 419
51 431
52 439
53 443
54 461
55 463
56 467
57 479
58 491
59 499
60 503

List of values

[3, 5, 7, 11, 17, 19, 23, 29, 31, 41, 43, 47, 53, 59, 71, 79, 83, 101, 103, 107, 109, 127, 131, 137, 139, 149, 163, 167, 179, 191, 197, 199, 211, 223, 227, 239, 251, 263, 269, 271, 281, 293, 311, 331, 347, 359, 367, 379, 383, 419, 431, 439, 443, 461, 463, 467, 479, 491, 499, 503]

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

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