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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.

A227179 After initial 0, integers from 0 to n(n-1) followed by integers from 0 to n(n+1) and so on.

Table of values

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

List of values

[0, 0, 0, 1, 2, 0, 1, 2, 3, 4, 5, 6, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30]

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