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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.

A372515 Irregular triangle read by rows where row n lists the positions of zeros in the reversed binary expansion of n.

Table of values

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

List of values

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

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