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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.

A303431 Aperiodic tree numbers. Matula-Goebel numbers of aperiodic rooted trees.

Table of values

n a(n)
1 1
2 2
3 3
4 5
5 6
6 10
7 11
8 12
9 13
10 15
11 18
12 20
13 22
14 24
15 26
16 29
17 30
18 31
19 33
20 37
21 39
22 40
23 41
24 44
25 45
26 47
27 48
28 50
29 52
30 54
31 55
32 58
33 60
34 61
35 62
36 65
37 66
38 71
39 72
40 74
41 75
42 78
43 79
44 80
45 82
46 87
47 88
48 89
49 90
50 93
51 94
52 96
53 99
54 101
55 104
56 108
57 109
58 110
59 111
60 113
61 116
62 117
63 120
64 122

List of values

[1, 2, 3, 5, 6, 10, 11, 12, 13, 15, 18, 20, 22, 24, 26, 29, 30, 31, 33, 37, 39, 40, 41, 44, 45, 47, 48, 50, 52, 54, 55, 58, 60, 61, 62, 65, 66, 71, 72, 74, 75, 78, 79, 80, 82, 87, 88, 89, 90, 93, 94, 96, 99, 101, 104, 108, 109, 110, 111, 113, 116, 117, 120, 122]

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

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