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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.

A278696 Primes p such that every suffix of the ternary (base-3) representation of p is a prime.

Table of values

n a(n)
1 2
2 5
3 11
4 23
5 29
6 59
7 83
8 167
9 173
10 191
11 491
12 509
13 569
14 653
15 659
16 677
17 1481
18 1487
19 1949
20 2027
21 2111
22 4397
23 4457
24 4547
25 4943
26 5051
27 5861
28 6323
29 6563
30 13127
31 13151
32 13313
33 13613
34 13691
35 13781
36 13799
37 15149
38 15233
39 17519
40 17579
41 17669
42 39371
43 39857
44 40847
45 40853
46 43913
47 44417
48 52517
49 53147
50 59051

List of values

[2, 5, 11, 23, 29, 59, 83, 167, 173, 191, 491, 509, 569, 653, 659, 677, 1481, 1487, 1949, 2027, 2111, 4397, 4457, 4547, 4943, 5051, 5861, 6323, 6563, 13127, 13151, 13313, 13613, 13691, 13781, 13799, 15149, 15233, 17519, 17579, 17669, 39371, 39857, 40847, 40853, 43913, 44417, 52517, 53147, 59051]

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

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