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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.

A144328 A002260 preceded by a column of 1's: a (1, 1, 2, 3, 4, 5, ...) crescendo triangle by rows.

Table of values

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

List of values

[1, 1, 1, 1, 1, 2, 1, 1, 2, 3, 1, 1, 2, 3, 4, 1, 1, 2, 3, 4, 5, 1, 1, 2, 3, 4, 5, 6, 1, 1, 2, 3, 4, 5, 6, 7, 1, 1, 2, 3, 4, 5, 6, 7, 8, 1, 1, 2, 3, 4, 5, 6, 7, 8, 9, 1, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 1, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11]

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