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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.

A054868 Sum of bits of sum of bits of n: a(n) = wt(wt(n)).

Table of values

n a(n)
0 0
1 1
2 1
3 1
4 1
5 1
6 1
7 2
8 1
9 1
10 1
11 2
12 1
13 2
14 2
15 1
16 1
17 1
18 1
19 2
20 1
21 2
22 2
23 1
24 1
25 2
26 2
27 1
28 2
29 1
30 1
31 2
32 1
33 1
34 1
35 2
36 1
37 2
38 2
39 1
40 1
41 2
42 2
43 1
44 2
45 1
46 1
47 2
48 1
49 2
50 2
51 1
52 2
53 1
54 1
55 2
56 2
57 1
58 1
59 2
60 1
61 2
62 2
63 2
64 1
65 1
66 1
67 2
68 1
69 2
70 2
71 1
72 1
73 2
74 2
75 1
76 2
77 1
78 1
79 2
80 1
81 2
82 2
83 1
84 2
85 1
86 1
87 2
88 2
89 1
90 1
91 2
92 1
93 2
94 2
95 2
96 1
97 2
98 2

List of values

[0, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 2, 1, 2, 2, 1, 1, 1, 1, 2, 1, 2, 2, 1, 1, 2, 2, 1, 2, 1, 1, 2, 1, 1, 1, 2, 1, 2, 2, 1, 1, 2, 2, 1, 2, 1, 1, 2, 1, 2, 2, 1, 2, 1, 1, 2, 2, 1, 1, 2, 1, 2, 2, 2, 1, 1, 1, 2, 1, 2, 2, 1, 1, 2, 2, 1, 2, 1, 1, 2, 1, 2, 2, 1, 2, 1, 1, 2, 2, 1, 1, 2, 1, 2, 2, 2, 1, 2, 2]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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