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.

A002224 Smallest prime p of form p = 8k+1 such that first n primes (p_1=2, ..., p_n) are quadratic residues mod p.

Table of values

n a(n)
1 17
2 73
3 241
4 1009
5 2689
6 8089
7 33049
8 53881
9 87481
10 483289
11 515761
12 1083289
13 3818929
14 3818929
15 9257329
16 22000801
17 48473881
18 48473881
19 175244281
20 427733329
21 427733329
22 898716289
23 8114538721
24 9176747449
25 23616331489
26 23616331489
27 23616331489
28 196265095009
29 196265095009
30 196265095009
31 196265095009
32 2871842842801
33 2871842842801
34 2871842842801
35 26437680473689

List of values

[17, 73, 241, 1009, 2689, 8089, 33049, 53881, 87481, 483289, 515761, 1083289, 3818929, 3818929, 9257329, 22000801, 48473881, 48473881, 175244281, 427733329, 427733329, 898716289, 8114538721, 9176747449, 23616331489, 23616331489, 23616331489, 196265095009, 196265095009, 196265095009, 196265095009, 2871842842801, 2871842842801, 2871842842801, 26437680473689]

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

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