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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.

A151704 a(0)=1, a(1)=0; a(2^i+j) = 2*a(j) + a(j+1) for 0 <= j < 2^i.

Table of values

n a(n)
0 1
1 0
2 2
3 2
4 2
5 2
6 6
7 6
8 2
9 2
10 6
11 6
12 6
13 10
14 18
15 14
16 2
17 2
18 6
19 6
20 6
21 10
22 18
23 14
24 6
25 10
26 18
27 18
28 22
29 38
30 50
31 30
32 2
33 2
34 6
35 6
36 6
37 10
38 18
39 14
40 6
41 10
42 18
43 18
44 22
45 38
46 50
47 30
48 6
49 10
50 18
51 18
52 22
53 38
54 50
55 34
56 22
57 38
58 54
59 58
60 82
61 126
62 130
63 62
64 2
65 2
66 6
67 6
68 6
69 10
70 18
71 14
72 6
73 10
74 18
75 18
76 22
77 38
78 50
79 30
80 6

List of values

[1, 0, 2, 2, 2, 2, 6, 6, 2, 2, 6, 6, 6, 10, 18, 14, 2, 2, 6, 6, 6, 10, 18, 14, 6, 10, 18, 18, 22, 38, 50, 30, 2, 2, 6, 6, 6, 10, 18, 14, 6, 10, 18, 18, 22, 38, 50, 30, 6, 10, 18, 18, 22, 38, 50, 34, 22, 38, 54, 58, 82, 126, 130, 62, 2, 2, 6, 6, 6, 10, 18, 14, 6, 10, 18, 18, 22, 38, 50, 30, 6]

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