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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.

A070861 Triangle of all possible distinct numbers obtained as a product of distinct numbers from 1..n.

Table of values

n a(n)
0 1
1 1
2 1
3 2
4 1
5 2
6 3
7 6
8 1
9 2
10 3
11 4
12 6
13 8
14 12
15 24
16 1
17 2
18 3
19 4
20 5
21 6
22 8
23 10
24 12
25 15
26 20
27 24
28 30
29 40
30 60
31 120
32 1
33 2
34 3
35 4
36 5
37 6
38 8
39 10
40 12
41 15
42 18
43 20
44 24
45 30
46 36
47 40
48 48
49 60
50 72
51 90
52 120
53 144
54 180
55 240
56 360
57 720
58 1
59 2
60 3
61 4
62 5
63 6
64 7
65 8
66 10
67 12
68 14
69 15
70 18
71 20
72 21
73 24
74 28
75 30
76 35
77 36
78 40
79 42

List of values

[1, 1, 1, 2, 1, 2, 3, 6, 1, 2, 3, 4, 6, 8, 12, 24, 1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 120, 1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 18, 20, 24, 30, 36, 40, 48, 60, 72, 90, 120, 144, 180, 240, 360, 720, 1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 18, 20, 21, 24, 28, 30, 35, 36, 40, 42]

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

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