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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.

A004514 Generalized nim sum n + n in base 4.

Table of values

n a(n)
0 0
1 2
2 0
3 2
4 8
5 10
6 8
7 10
8 0
9 2
10 0
11 2
12 8
13 10
14 8
15 10
16 32
17 34
18 32
19 34
20 40
21 42
22 40
23 42
24 32
25 34
26 32
27 34
28 40
29 42
30 40
31 42
32 0
33 2
34 0
35 2
36 8
37 10
38 8
39 10
40 0
41 2
42 0
43 2
44 8
45 10
46 8
47 10
48 32
49 34
50 32
51 34
52 40
53 42
54 40
55 42
56 32
57 34
58 32
59 34
60 40
61 42
62 40
63 42
64 128
65 130
66 128
67 130
68 136
69 138
70 136
71 138
72 128

List of values

[0, 2, 0, 2, 8, 10, 8, 10, 0, 2, 0, 2, 8, 10, 8, 10, 32, 34, 32, 34, 40, 42, 40, 42, 32, 34, 32, 34, 40, 42, 40, 42, 0, 2, 0, 2, 8, 10, 8, 10, 0, 2, 0, 2, 8, 10, 8, 10, 32, 34, 32, 34, 40, 42, 40, 42, 32, 34, 32, 34, 40, 42, 40, 42, 128, 130, 128, 130, 136, 138, 136, 138, 128]

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