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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.

A228451 Recurrence: a(2n) = a(n), a(2n+1) = a(n) + 2n + 1, with a(0) = 0, a(1) = 1.

Table of values

n a(n)
0 0
1 1
2 1
3 4
4 1
5 6
6 4
7 11
8 1
9 10
10 6
11 17
12 4
13 17
14 11
15 26
16 1
17 18
18 10
19 29
20 6
21 27
22 17
23 40
24 4
25 29
26 17
27 44
28 11
29 40
30 26
31 57
32 1
33 34
34 18
35 53
36 10
37 47
38 29
39 68
40 6
41 47
42 27
43 70
44 17
45 62
46 40
47 87
48 4
49 53
50 29
51 80
52 17
53 70
54 44
55 99
56 11
57 68
58 40
59 99
60 26
61 87
62 57
63 120
64 1
65 66
66 34
67 101
68 18
69 87
70 53
71 124
72 10
73 83
74 47
75 122
76 29
77 106
78 68

List of values

[0, 1, 1, 4, 1, 6, 4, 11, 1, 10, 6, 17, 4, 17, 11, 26, 1, 18, 10, 29, 6, 27, 17, 40, 4, 29, 17, 44, 11, 40, 26, 57, 1, 34, 18, 53, 10, 47, 29, 68, 6, 47, 27, 70, 17, 62, 40, 87, 4, 53, 29, 80, 17, 70, 44, 99, 11, 68, 40, 99, 26, 87, 57, 120, 1, 66, 34, 101, 18, 87, 53, 124, 10, 83, 47, 122, 29, 106, 68]

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