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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.

A347691 a(n) = index of n in A308387, or -1 if n does not appear in A308387.

Table of values

n a(n)
1 20
2 1
3 11
4 10
5 8
6 3
7 38
8 5
9 17
10 4
11 6
12 19
13 9
14 16
15 24
16 14
17 21
18 27
19 12
20 2
21 25
22 36
23 28
24 15
25 32
26 43
27 18
28 23
29 74
30 33
31 37
32 39
33 42
34 29
35 44
36 22
37 31
38 46
39 45
40 56
41 47
42 52
43 26
44 48
45 61
46 60
47 41
48 49
49 53
50 73
51 59
52 13
53 57
54 91
55 64
56 40
57 66
58 62
59 51
60 7
61 30
62 58
63 101
64 55
65 70
66 69
67 86
68 34
69 75
70 65
71 80
72 78
73 50

List of values

[20, 1, 11, 10, 8, 3, 38, 5, 17, 4, 6, 19, 9, 16, 24, 14, 21, 27, 12, 2, 25, 36, 28, 15, 32, 43, 18, 23, 74, 33, 37, 39, 42, 29, 44, 22, 31, 46, 45, 56, 47, 52, 26, 48, 61, 60, 41, 49, 53, 73, 59, 13, 57, 91, 64, 40, 66, 62, 51, 7, 30, 58, 101, 55, 70, 69, 86, 34, 75, 65, 80, 78, 50]

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

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