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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.

A362257 a(n) = 2*Q(n) - n, where Q(n) is Hofstadter's Q-sequence A005185.

Table of values

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

List of values

[1, 0, 1, 2, 1, 2, 3, 2, 3, 2, 1, 4, 3, 2, 5, 2, 3, 4, 3, 4, 3, 2, 1, 8, 3, 2, 5, 4, 3, 2, 9, 2, 1, 6, 7, 2, 3, 6, 3, 4, 5, 4, 5, 4, 3, 2, 1, 16, -1, 0, 9, 4, -1, 6, 5, 0, 7, 2, 5, 4, 3, 2, 17, 2, -3, 10, 3, -2, 9, 10, 3, 4, 7, 4, 5, 2, 7, 2, 3, 6, 7, 4, 3, 8]

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