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.

A349538 The number of pseudo-Pythagorean triples (which allow negative or 0 sides) on a 2D lattice that are on or inside a circle of radius n.

Table of values

n a(n)
0 1
1 5
2 9
3 13
4 17
5 29
6 33
7 37
8 41
9 45
10 57
11 61
12 65
13 77
14 81
15 93
16 97
17 109
18 113
19 117
20 129
21 133
22 137
23 141
24 145
25 165
26 177
27 181
28 185
29 197
30 209
31 213
32 217
33 221
34 233
35 245
36 249
37 261
38 265
39 277
40 289
41 301
42 305
43 309
44 313
45 325
46 329
47 333
48 337
49 341
50 361
51 373
52 385
53 397
54 401
55 413
56 417
57 421
58 433
59 437
60 449

List of values

[1, 5, 9, 13, 17, 29, 33, 37, 41, 45, 57, 61, 65, 77, 81, 93, 97, 109, 113, 117, 129, 133, 137, 141, 145, 165, 177, 181, 185, 197, 209, 213, 217, 221, 233, 245, 249, 261, 265, 277, 289, 301, 305, 309, 313, 325, 329, 333, 337, 341, 361, 373, 385, 397, 401, 413, 417, 421, 433, 437, 449]

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

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