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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.

A147969 Smallest prime p modulo which numbers 1,2,...,n are quadratic residues.

Table of values

n a(n)
1 2
2 7
3 23
4 23
5 71
6 71
7 311
8 311
9 311
10 311
11 479
12 479
13 1559
14 1559
15 1559
16 1559
17 5711
18 5711
19 10559
20 10559
21 10559
22 10559
23 18191
24 18191
25 18191
26 18191
27 18191
28 18191
29 31391
30 31391
31 366791
32 366791
33 366791
34 366791
35 366791
36 366791
37 366791
38 366791
39 366791

List of values

[2, 7, 23, 23, 71, 71, 311, 311, 311, 311, 479, 479, 1559, 1559, 1559, 1559, 5711, 5711, 10559, 10559, 10559, 10559, 18191, 18191, 18191, 18191, 18191, 18191, 31391, 31391, 366791, 366791, 366791, 366791, 366791, 366791, 366791, 366791, 366791]

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

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