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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.

A368108 a(1,2,3) = 1,2,3. For n > 3, a(n) is the smallest of the least novel multiples of all primes which divide an earlier term but do not divide a(n-1). If the prime divisors of all prior terms also divide a(n-1), a(n) is the least novel multiple of the smallest prime which does not divide a(n-1).

Table of values

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

List of values

[1, 2, 3, 4, 6, 5, 8, 9, 10, 12, 15, 14, 18, 7, 16, 20, 21, 22, 24, 11, 25, 26, 27, 13, 28, 30, 33, 32, 35, 34, 36, 17, 38, 39, 19, 40, 42, 44, 45, 46, 48, 23, 49, 50, 51, 52, 54, 55, 56, 57, 58, 60, 29, 62, 63, 31, 64, 65, 66, 68, 69, 70, 72, 75, 74, 76, 37, 77]

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

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