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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.

A272610 a(1)=5, a(2)=9, a(3)=4, a(4)=6; thereafter a(n) = a(n-a(n-1)) + a(n-a(n-2)).

Table of values

n a(n)
1 5
2 9
3 4
4 6
5 5
6 5
7 18
8 4
9 5
10 10
11 10
12 18
13 4
14 10
15 15
16 10
17 27
18 4
19 15
20 15
21 10
22 36
23 4
24 15
25 20
26 15
27 36
28 4
29 20
30 25
31 15
32 45
33 4
34 25
35 25
36 20
37 45
38 4
39 25
40 35
41 15
42 54
43 4
44 35
45 25
46 20
47 72
48 4
49 25
50 40
51 25
52 54
53 4
54 40
55 40
56 20
57 72
58 4
59 40
60 35
61 25
62 81
63 4
64 35
65 50
66 25
67 81
68 4
69 50
70 40
71 25
72 117

List of values

[5, 9, 4, 6, 5, 5, 18, 4, 5, 10, 10, 18, 4, 10, 15, 10, 27, 4, 15, 15, 10, 36, 4, 15, 20, 15, 36, 4, 20, 25, 15, 45, 4, 25, 25, 20, 45, 4, 25, 35, 15, 54, 4, 35, 25, 20, 72, 4, 25, 40, 25, 54, 4, 40, 40, 20, 72, 4, 40, 35, 25, 81, 4, 35, 50, 25, 81, 4, 50, 40, 25, 117]

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