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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.

A176919 Triangle by columns: (1, 2, 3, ...) in each column interleaved with (0, 1, 2, ...) zeros. Columns > 1 shifted down twice.

Table of values

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

List of values

[1, 2, 0, 3, 1, 0, 4, 0, 0, 0, 5, 2, 1, 0, 0, 6, 0, 0, 0, 0, 0, 7, 3, 0, 1, 0, 0, 0, 8, 0, 2, 0, 0, 0, 0, 0, 9, 4, 0, 0, 1, 0, 0, 0, 0, 10, 0, 0, 0, 0, 0, 0, 0, 0, 0, 11, 5, 3, 2, 0, 1, 0, 0, 0, 0, 0, 12, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]

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