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.

A333966 Positive integers where the number of triples of divisors (d1, d2, d3) such that d1 < d2 < d3 < 2*d1 and each pair of these divisors is pairwise coprime, sets a new record.

Table of values

n a(n)
1 1
2 60
3 280
4 420
5 840
6 1260
7 2520
8 6930
9 9240
10 13860
11 27720
12 55440
13 60060
14 120120
15 180180
16 240240
17 360360
18 720720
19 1021020
20 1801800
21 2042040
22 2282280
23 2762760
24 3063060
25 4084080
26 4564560
27 6126120
28 12252240
29 19399380
30 24504480
31 30630600
32 36756720
33 38798760
34 58198140
35 77597520

List of values

[1, 60, 280, 420, 840, 1260, 2520, 6930, 9240, 13860, 27720, 55440, 60060, 120120, 180180, 240240, 360360, 720720, 1021020, 1801800, 2042040, 2282280, 2762760, 3063060, 4084080, 4564560, 6126120, 12252240, 19399380, 24504480, 30630600, 36756720, 38798760, 58198140, 77597520]

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

Content is available under The OEIS End-User License Agreement.