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.

A051670 Smallest prime that concatenated with all previous terms of sequence forms a prime.

Table of values

n a(n)
1 2
2 3
3 3
4 3
5 3
6 23
7 7
8 3
9 53
10 19
11 149
12 571
13 3
14 131
15 3
16 151
17 389
18 31
19 389
20 97
21 59
22 277
23 491
24 181
25 59
26 67
27 647
28 1117
29 797
30 433
31 41
32 367
33 29
34 487
35 719
36 283
37 347
38 97
39 1103
40 193
41 821
42 13
43 29
44 31
45 947
46 619
47 167
48 229
49 479
50 271
51 1217
52 79
53 2777
54 241
55 1361
56 751
57 83
58 4603
59 317

List of values

[2, 3, 3, 3, 3, 23, 7, 3, 53, 19, 149, 571, 3, 131, 3, 151, 389, 31, 389, 97, 59, 277, 491, 181, 59, 67, 647, 1117, 797, 433, 41, 367, 29, 487, 719, 283, 347, 97, 1103, 193, 821, 13, 29, 31, 947, 619, 167, 229, 479, 271, 1217, 79, 2777, 241, 1361, 751, 83, 4603, 317]

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

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