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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.

A380227 Beginning with 11, least prime such that concatenation of first n terms and its digit reversal both are primes.

Table of values

n a(n)
1 11
2 3
3 11
4 31
5 59
6 463
7 131
8 103
9 599
10 3253
11 7649
12 439
13 12791
14 2953
15 17321
16 16651
17 10007
18 51787
19 4871
20 1483
21 6857
22 15649
23 53051
24 61441
25 84449
26 35533
27 19913
28 39097
29 23081
30 206527
31 44939
32 189517
33 32369
34 106657
35 606899
36 117703
37 222977
38 220903
39 69779
40 12007
41 95063
42 136471
43 43973

List of values

[11, 3, 11, 31, 59, 463, 131, 103, 599, 3253, 7649, 439, 12791, 2953, 17321, 16651, 10007, 51787, 4871, 1483, 6857, 15649, 53051, 61441, 84449, 35533, 19913, 39097, 23081, 206527, 44939, 189517, 32369, 106657, 606899, 117703, 222977, 220903, 69779, 12007, 95063, 136471, 43973]

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

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