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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.

A284383 a(1) = 1, a(2) = 2, a(3) = 3, a(4) = 2; a(n) is the largest composite number <= (a(n-a(n-1)) + a(n-a(n-2))) for n > 4.

Table of values

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

List of values

[1, 2, 3, 2, 4, 4, 6, 4, 6, 6, 8, 6, 10, 6, 10, 10, 12, 8, 14, 10, 14, 10, 16, 10, 16, 16, 16, 12, 22, 12, 20, 16, 22, 14, 24, 16, 24, 16, 26, 16, 26, 26, 24, 18, 30, 22, 28, 26, 30, 20, 34, 24, 36, 20, 38, 24, 36, 24, 40, 26, 38, 26, 40, 26, 42, 26, 42, 42, 32, 28, 50, 28, 46, 34]

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