cp's OEIS Frontend

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.

A109981 Primes such that both the sum of digits and the number of digits are primes.

Table of values

n a(n)
1 11
2 23
3 29
4 41
5 43
6 47
7 61
8 67
9 83
10 89
11 101
12 113
13 131
14 137
15 139
16 151
17 157
18 173
19 179
20 191
21 193
22 197
23 199
24 223
25 227
26 229
27 241
28 263
29 269
30 281
31 283
32 311
33 313
34 317
35 331
36 337
37 353
38 359
39 373
40 379
41 397
42 401
43 409
44 421
45 443
46 449
47 461
48 463
49 467
50 487
51 557
52 571
53 577
54 593

List of values

[11, 23, 29, 41, 43, 47, 61, 67, 83, 89, 101, 113, 131, 137, 139, 151, 157, 173, 179, 191, 193, 197, 199, 223, 227, 229, 241, 263, 269, 281, 283, 311, 313, 317, 331, 337, 353, 359, 373, 379, 397, 401, 409, 421, 443, 449, 461, 463, 467, 487, 557, 571, 577, 593]