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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.

A372699 a(1) = 1, j = a(n-1). For n > 1, a(n) is the least novel m such that rad(m*j) is the smallest primorial number divisible by A007947(j).

Table of values

n a(n)
1 1
2 2
3 3
4 4
5 6
6 5
7 12
8 10
9 9
10 8
11 18
12 15
13 16
14 24
15 20
16 27
17 32
18 36
19 25
20 30
21 7
22 60
23 14
24 45
25 40
26 48
27 50
28 54
29 75
30 64
31 72
32 80
33 81
34 96
35 90
36 21
37 70
38 42
39 35
40 84
41 100
42 108
43 120
44 28
45 105
46 56
47 135
48 128
49 144
50 125
51 150
52 49
53 180
54 63
55 140
56 126
57 160
58 162
59 200
60 192
61 225
62 216
63 240

List of values

[1, 2, 3, 4, 6, 5, 12, 10, 9, 8, 18, 15, 16, 24, 20, 27, 32, 36, 25, 30, 7, 60, 14, 45, 40, 48, 50, 54, 75, 64, 72, 80, 81, 96, 90, 21, 70, 42, 35, 84, 100, 108, 120, 28, 105, 56, 135, 128, 144, 125, 150, 49, 180, 63, 140, 126, 160, 162, 200, 192, 225, 216, 240]

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

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