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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.

A151572 a(0)=0, a(1)=1; a(2^i + j) = a(j) + 2*a(j+1) for 0 <= j < 2^i.

Table of values

n a(n)
0 0
1 1
2 2
3 5
4 2
5 5
6 12
7 9
8 2
9 5
10 12
11 9
12 12
13 29
14 30
15 13
16 2
17 5
18 12
19 9
20 12
21 29
22 30
23 13
24 12
25 29
26 30
27 33
28 70
29 89
30 56
31 17
32 2
33 5
34 12
35 9
36 12
37 29
38 30
39 13
40 12
41 29
42 30
43 33
44 70
45 89
46 56
47 17
48 12
49 29
50 30
51 33
52 70
53 89
54 56
55 37
56 70
57 89
58 96
59 173
60 248
61 201
62 90
63 21
64 2
65 5
66 12
67 9
68 12
69 29
70 30
71 13
72 12
73 29
74 30
75 33
76 70

List of values

[0, 1, 2, 5, 2, 5, 12, 9, 2, 5, 12, 9, 12, 29, 30, 13, 2, 5, 12, 9, 12, 29, 30, 13, 12, 29, 30, 33, 70, 89, 56, 17, 2, 5, 12, 9, 12, 29, 30, 13, 12, 29, 30, 33, 70, 89, 56, 17, 12, 29, 30, 33, 70, 89, 56, 37, 70, 89, 96, 173, 248, 201, 90, 21, 2, 5, 12, 9, 12, 29, 30, 13, 12, 29, 30, 33, 70]

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