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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.

A276190 Sum of the squares of the digits of the base-4 representation of n.

Table of values

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

List of values

[0, 1, 4, 9, 1, 2, 5, 10, 4, 5, 8, 13, 9, 10, 13, 18, 1, 2, 5, 10, 2, 3, 6, 11, 5, 6, 9, 14, 10, 11, 14, 19, 4, 5, 8, 13, 5, 6, 9, 14, 8, 9, 12, 17, 13, 14, 17, 22, 9, 10, 13, 18, 10, 11, 14, 19, 13, 14, 17, 22, 18, 19, 22, 27, 1, 2, 5, 10, 2, 3, 6, 11, 5, 6, 9, 14, 10, 11, 14, 19, 2]

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