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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.

A151573 a(0)=1, 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 1
1 1
2 3
3 7
4 3
5 7
6 17
7 13
8 3
9 7
10 17
11 13
12 17
13 41
14 43
15 19
16 3
17 7
18 17
19 13
20 17
21 41
22 43
23 19
24 17
25 41
26 43
27 47
28 99
29 127
30 81
31 25
32 3
33 7
34 17
35 13
36 17
37 41
38 43
39 19
40 17
41 41
42 43
43 47
44 99
45 127
46 81
47 25
48 17
49 41
50 43
51 47
52 99
53 127
54 81
55 53
56 99
57 127
58 137
59 245
60 353
61 289
62 131
63 31
64 3
65 7
66 17
67 13
68 17
69 41
70 43
71 19
72 17

List of values

[1, 1, 3, 7, 3, 7, 17, 13, 3, 7, 17, 13, 17, 41, 43, 19, 3, 7, 17, 13, 17, 41, 43, 19, 17, 41, 43, 47, 99, 127, 81, 25, 3, 7, 17, 13, 17, 41, 43, 19, 17, 41, 43, 47, 99, 127, 81, 25, 17, 41, 43, 47, 99, 127, 81, 53, 99, 127, 137, 245, 353, 289, 131, 31, 3, 7, 17, 13, 17, 41, 43, 19, 17]

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