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.

A335268 Numbers that are not powers of primes (A024619) whose harmonic mean of their unitary divisors that are larger than 1 is an integer.

Table of values

n a(n)
1 6
2 15
3 20
4 24
5 28
6 30
7 45
8 60
9 72
10 90
11 91
12 96
13 100
14 112
15 153
16 216
17 220
18 240
19 264
20 272
21 325
22 352
23 360
24 364
25 378
26 496
27 703
28 765
29 780
30 816
31 832
32 1056
33 1125
34 1170
35 1225
36 1360
37 1431
38 1512
39 1656
40 1760
41 1891
42 1900
43 1984
44 2275
45 2448
46 2520
47 2701
48 2912
49 3024
50 3168
51 3321

List of values

[6, 15, 20, 24, 28, 30, 45, 60, 72, 90, 91, 96, 100, 112, 153, 216, 220, 240, 264, 272, 325, 352, 360, 364, 378, 496, 703, 765, 780, 816, 832, 1056, 1125, 1170, 1225, 1360, 1431, 1512, 1656, 1760, 1891, 1900, 1984, 2275, 2448, 2520, 2701, 2912, 3024, 3168, 3321]

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

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