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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.

A384034 Irregular triangle read by rows. Start with T(1,1) = 1. For each subsequent row, traverse the array so far. For each value m, insert m new values from the next unused integers immediately to the right of m. The process is repeated row by row, where each number in the array dictates how many new values are added after it.

Table of values

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

List of values

[1, 1, 2, 1, 3, 2, 4, 5, 1, 6, 3, 7, 8, 9, 2, 10, 11, 4, 12, 13, 14, 15, 5, 16, 17, 18, 19, 20, 1, 21, 6, 22, 23, 24, 25, 26, 27, 3, 28, 29, 30, 7, 31, 32, 33, 34, 35, 36, 37, 8, 38, 39, 40, 41, 42, 43, 44, 45, 9, 46, 47, 48, 49, 50, 51, 52, 53, 54, 2, 55, 56]

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