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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.

A277872 Number of ways of writing n as a sum of powers of 4, each power being used at most four times.

Table of values

n a(n)
0 1
1 1
2 1
3 1
4 2
5 1
6 1
7 1
8 2
9 1
10 1
11 1
12 2
13 1
14 1
15 1
16 3
17 2
18 2
19 2
20 3
21 1
22 1
23 1
24 2
25 1
26 1
27 1
28 2
29 1
30 1
31 1
32 3
33 2
34 2
35 2
36 3
37 1
38 1
39 1
40 2
41 1
42 1
43 1
44 2
45 1
46 1
47 1
48 3
49 2
50 2
51 2
52 3
53 1
54 1
55 1
56 2
57 1
58 1
59 1
60 2
61 1
62 1
63 1
64 4
65 3
66 3
67 3
68 5
69 2
70 2
71 2
72 4
73 2
74 2
75 2
76 4
77 2
78 2
79 2
80 5
81 3
82 3
83 3
84 4
85 1

List of values

[1, 1, 1, 1, 2, 1, 1, 1, 2, 1, 1, 1, 2, 1, 1, 1, 3, 2, 2, 2, 3, 1, 1, 1, 2, 1, 1, 1, 2, 1, 1, 1, 3, 2, 2, 2, 3, 1, 1, 1, 2, 1, 1, 1, 2, 1, 1, 1, 3, 2, 2, 2, 3, 1, 1, 1, 2, 1, 1, 1, 2, 1, 1, 1, 4, 3, 3, 3, 5, 2, 2, 2, 4, 2, 2, 2, 4, 2, 2, 2, 5, 3, 3, 3, 4, 1]

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