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.

A050797 Numbers n such that n^2 - 1 is expressible as the sum of two nonzero squares in exactly one way.

Table of values

n a(n)
1 3
2 9
3 17
4 19
5 33
6 35
7 73
8 145
9 161
10 163
11 195
12 243
13 393
14 483
15 513
16 721
17 723
18 1153
19 1763
20 2177
21 2305
22 2593
23 4803
24 5185
25 5833
26 6273
27 6963
28 7057
29 7395
30 8713
31 9523
32 9603
33 10083
34 12483
35 13923
36 14113
37 15875
38 17425
39 17673
40 19043
41 20737

List of values

[3, 9, 17, 19, 33, 35, 73, 145, 161, 163, 195, 243, 393, 483, 513, 721, 723, 1153, 1763, 2177, 2305, 2593, 4803, 5185, 5833, 6273, 6963, 7057, 7395, 8713, 9523, 9603, 10083, 12483, 13923, 14113, 15875, 17425, 17673, 19043, 20737]

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

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