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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.

A073641 a(1) = 2; a(n) = smallest prime not included earlier such that concatenation of two successive terms is a prime.

Table of values

n a(n)
1 2
2 3
3 7
4 19
5 13
6 61
7 31
8 37
9 67
10 79
11 103
12 43
13 73
14 127
15 139
16 97
17 151
18 157
19 109
20 199
21 181
22 193
23 163
24 211
25 229
26 223
27 241
28 271
29 277
30 331
31 283
32 397
33 337
34 313
35 307
36 367
37 457
38 421
39 349
40 373
41 379
42 433
43 439
44 409
45 463
46 523
47 487
48 601
49 541
50 547
51 499
52 571
53 673
54 613
55 577

List of values

[2, 3, 7, 19, 13, 61, 31, 37, 67, 79, 103, 43, 73, 127, 139, 97, 151, 157, 109, 199, 181, 193, 163, 211, 229, 223, 241, 271, 277, 331, 283, 397, 337, 313, 307, 367, 457, 421, 349, 373, 379, 433, 439, 409, 463, 523, 487, 601, 541, 547, 499, 571, 673, 613, 577]

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

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