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.

A333885 Number of triples (i,j,k) with 1 <= i < j < k <= n such that i divides j divides k.

Table of values

n a(n)
1 0
2 0
3 0
4 1
5 1
6 3
7 3
8 6
9 7
10 9
11 9
12 16
13 16
14 18
15 20
16 26
17 26
18 33
19 33
20 40
21 42
22 44
23 44
24 59
25 60
26 62
27 65
28 72
29 72
30 84
31 84
32 94
33 96
34 98
35 100
36 119
37 119
38 121
39 123
40 138
41 138
42 150
43 150
44 157
45 164
46 166
47 166
48 192
49 193
50 200
51 202
52 209
53 209
54 224
55 226
56 241
57 243
58 245
59 245
60 276
61 276

List of values

[0, 0, 0, 1, 1, 3, 3, 6, 7, 9, 9, 16, 16, 18, 20, 26, 26, 33, 33, 40, 42, 44, 44, 59, 60, 62, 65, 72, 72, 84, 84, 94, 96, 98, 100, 119, 119, 121, 123, 138, 138, 150, 150, 157, 164, 166, 166, 192, 193, 200, 202, 209, 209, 224, 226, 241, 243, 245, 245, 276, 276]

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

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