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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.

A211428 Number of ordered triples (w,x,y) with all terms in {-n,...,0,...,n} and 2*w^2+3*x*y=0.

Table of values

n a(n)
0 1
1 5
2 9
3 21
4 25
5 29
6 49
7 53
8 65
9 77
10 81
11 85
12 105
13 109
14 113
15 125
16 137
17 141
18 161
19 165
20 169
21 181
22 185
23 189
24 225
25 237
26 241
27 269
28 273
29 277
30 305
31 309
32 329
33 341
34 345
35 349
36 377
37 381
38 385
39 397
40 409
41 413
42 433
43 437
44 441
45 453
46 457
47 461
48 497
49 517
50 545
51 557
52 561

List of values

[1, 5, 9, 21, 25, 29, 49, 53, 65, 77, 81, 85, 105, 109, 113, 125, 137, 141, 161, 165, 169, 181, 185, 189, 225, 237, 241, 269, 273, 277, 305, 309, 329, 341, 345, 349, 377, 381, 385, 397, 409, 413, 433, 437, 441, 453, 457, 461, 497, 517, 545, 557, 561]

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

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