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.

A080478 a(n) = smallest k>a(n-1) such that k^2+a(n-1)^2 is prime, starting with a(1)=1. Square roots of A062067(n).

Table of values

n a(n)
1 1
2 2
3 3
4 8
5 13
6 20
7 23
8 30
9 31
10 44
11 49
12 74
13 79
14 80
15 89
16 96
17 101
18 104
19 105
20 116
21 119
22 124
23 131
24 134
25 139
26 140
27 149
28 150
29 157
30 158
31 165
32 172
33 173
34 178
35 183
36 202
37 203
38 230
39 231
40 250
41 257
42 260
43 261
44 274
45 289
46 290
47 291
48 296
49 311
50 334
51 335
52 342
53 343
54 360
55 367
56 372

List of values

[1, 2, 3, 8, 13, 20, 23, 30, 31, 44, 49, 74, 79, 80, 89, 96, 101, 104, 105, 116, 119, 124, 131, 134, 139, 140, 149, 150, 157, 158, 165, 172, 173, 178, 183, 202, 203, 230, 231, 250, 257, 260, 261, 274, 289, 290, 291, 296, 311, 334, 335, 342, 343, 360, 367, 372]

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

Content is available under The OEIS End-User License Agreement.