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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.

A120108 Number triangle T(n,k) = lcm(1,..,n+1)/lcm(1,..,k+1).

Table of values

n a(n)
0 1
1 2
2 1
3 6
4 3
5 1
6 12
7 6
8 2
9 1
10 60
11 30
12 10
13 5
14 1
15 60
16 30
17 10
18 5
19 1
20 1
21 420
22 210
23 70
24 35
25 7
26 7
27 1
28 840
29 420
30 140
31 70
32 14
33 14
34 2
35 1
36 2520
37 1260
38 420
39 210
40 42
41 42
42 6
43 3
44 1
45 2520
46 1260
47 420
48 210
49 42
50 42
51 6
52 3
53 1
54 1
55 27720
56 13860
57 4620
58 2310
59 462
60 462
61 66
62 33
63 11
64 11
65 1

List of values

[1, 2, 1, 6, 3, 1, 12, 6, 2, 1, 60, 30, 10, 5, 1, 60, 30, 10, 5, 1, 1, 420, 210, 70, 35, 7, 7, 1, 840, 420, 140, 70, 14, 14, 2, 1, 2520, 1260, 420, 210, 42, 42, 6, 3, 1, 2520, 1260, 420, 210, 42, 42, 6, 3, 1, 1, 27720, 13860, 4620, 2310, 462, 462, 66, 33, 11, 11, 1]