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.

A197121 Nonsquare positive integers n such that the fundamental unit of quadratic field Q(sqrt(d))has norm 1 and minimum one from two parts of fundamental unit are not integer.

Table of values

n a(n)
1 21
2 69
3 77
4 84
5 93
6 133
7 165
8 189
9 205
10 213
11 221
12 237
13 253
14 276
15 285
16 301
17 308
18 309
19 336
20 341
21 357
22 372
23 413
24 429
25 437
26 453
27 469
28 501
29 517
30 525
31 532
32 581
33 589
34 597
35 621
36 645
37 660
38 669
39 693
40 717
41 741
42 749
43 756
44 789
45 805
46 820
47 837
48 852
49 861
50 869
51 884
52 893
53 917

List of values

[21, 69, 77, 84, 93, 133, 165, 189, 205, 213, 221, 237, 253, 276, 285, 301, 308, 309, 336, 341, 357, 372, 413, 429, 437, 453, 469, 501, 517, 525, 532, 581, 589, 597, 621, 645, 660, 669, 693, 717, 741, 749, 756, 789, 805, 820, 837, 852, 861, 869, 884, 893, 917]

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

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