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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.

A274590 Numbers n such that n^2 - 1 is the average of two nonzero squares in exactly one way.

Table of values

n a(n)
1 9
2 19
3 33
4 35
5 73
6 99
7 145
8 161
9 163
10 195
11 243
12 393
13 483
14 513
15 577
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 19601
42 20737
43 26243

List of values

[9, 19, 33, 35, 73, 99, 145, 161, 163, 195, 243, 393, 483, 513, 577, 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, 19601, 20737, 26243]

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

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