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.

A109426 Numbers n such that tau(n)/omega(n) is not an integer [tau(n) =number of divisors of n; omega(n)=number of distinct prime factors of n].

Table of values

n a(n)
1 30
2 36
3 42
4 66
5 70
6 78
7 100
8 102
9 105
10 110
11 114
12 120
13 130
14 138
15 144
16 154
17 165
18 168
19 170
20 174
21 182
22 186
23 190
24 195
25 196
26 222
27 225
28 230
29 231
30 238
31 240
32 246
33 255
34 258
35 264
36 266
37 270
38 273
39 280
40 282
41 285
42 286
43 290
44 310
45 312
46 318
47 322
48 324
49 336
50 345
51 354
52 357
53 366

List of values

[30, 36, 42, 66, 70, 78, 100, 102, 105, 110, 114, 120, 130, 138, 144, 154, 165, 168, 170, 174, 182, 186, 190, 195, 196, 222, 225, 230, 231, 238, 240, 246, 255, 258, 264, 266, 270, 273, 280, 282, 285, 286, 290, 310, 312, 318, 322, 324, 336, 345, 354, 357, 366]

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

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