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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.

A331118 Irregular triangle read by rows where row n lists primitive first differences in the reduced residue system of A002110(n).

Table of values

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

List of values

[2, 2, 4, 2, 4, 6, 2, 4, 6, 8, 10, 2, 4, 6, 8, 10, 12, 14, 2, 4, 6, 8, 10, 12, 14, 16, 18, 22, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 34, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32, 34, 36]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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