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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.

A253718 Number h such that (h,0) is n steps from (0,0), where steps are as follows: (x,y)->(x-r, y) if r > 0, and (x,y)->(y, r/3) otherwise, where r = x mod 3.

Table of values

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

List of values

[0, 1, 1, 3, 4, 4, 3, 4, 4, 5, 6, 6, 6, 7, 7, 6, 7, 7, 5, 6, 6, 6, 7, 7, 6, 7, 7, 7, 8, 8, 8, 9, 9, 8, 9, 9, 8, 9, 9, 9, 10, 10, 9, 10, 10, 8, 9, 9, 9, 10, 10, 9, 10, 10, 7, 8, 8, 8, 9, 9, 8, 9, 9, 8, 9, 9, 9, 10, 10, 9, 10, 10, 8, 9, 9, 9, 10, 10, 9, 10, 10]

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