cp's OEIS Frontend

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.

A369825 a(1,2) = 1,2; thereafter let i = a(n-2) and r(n) = a(1)*a(2)*...*a(n-1): a(n) is the smallest novel multiple m of w = rad(r(n))/rad(i), where rad is A007947.

Table of values

n a(n)
1 1
2 2
3 4
4 3
5 6
6 8
7 5
8 15
9 12
10 10
11 20
12 9
13 18
14 30
15 25
16 7
17 42
18 60
19 35
20 14
21 24
22 45
23 70
24 28
25 21
26 75
27 40
28 56
29 63
30 90
31 50
32 49
33 84
34 120
35 55
36 77
37 126
38 150
39 110
40 154
41 105
42 135
43 22
44 308
45 210
46 165
47 11
48 98
49 420
50 330
51 33
52 91
53 910
54 660
55 66
56 182
57 455
58 495
59 132
60 364
61 1365
62 825

List of values

[1, 2, 4, 3, 6, 8, 5, 15, 12, 10, 20, 9, 18, 30, 25, 7, 42, 60, 35, 14, 24, 45, 70, 28, 21, 75, 40, 56, 63, 90, 50, 49, 84, 120, 55, 77, 126, 150, 110, 154, 105, 135, 22, 308, 210, 165, 11, 98, 420, 330, 33, 91, 910, 660, 66, 182, 455, 495, 132, 364, 1365, 825]