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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.

A212989 Number of (w,x,y) with all terms in {0,...,n} and 4*w = 4*x+y.

Table of values

n a(n)
0 1
1 2
2 3
3 4
4 9
5 11
6 13
7 15
8 24
9 27
10 30
11 33
12 46
13 50
14 54
15 58
16 75
17 80
18 85
19 90
20 111
21 117
22 123
23 129
24 154
25 161
26 168
27 175
28 204
29 212
30 220
31 228
32 261
33 270
34 279
35 288
36 325
37 335
38 345
39 355
40 396
41 407
42 418
43 429
44 474
45 486
46 498
47 510
48 559
49 572
50 585
51 598
52 651
53 665
54 679
55 693

List of values

[1, 2, 3, 4, 9, 11, 13, 15, 24, 27, 30, 33, 46, 50, 54, 58, 75, 80, 85, 90, 111, 117, 123, 129, 154, 161, 168, 175, 204, 212, 220, 228, 261, 270, 279, 288, 325, 335, 345, 355, 396, 407, 418, 429, 474, 486, 498, 510, 559, 572, 585, 598, 651, 665, 679, 693]

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

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