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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.

A030617 a(n)=(# 1's)-(# 0's) in first n terms of A030604.

Table of values

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

List of values

[1, 1, 1, 1, 2, 2, 2, 3, 3, 3, 3, 3, 4, 4, 5, 5, 5, 5, 5, 4, 3, 4, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 5, 6, 6, 6, 7, 8, 8, 8, 8, 8, 8, 9, 9, 8, 8, 8, 9, 10, 10, 10, 11, 11, 11, 11, 10, 10, 10, 11, 11, 11, 11, 11, 11, 11, 10, 10, 9, 10, 10, 10, 10, 10]

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