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.

A128693 Numbers of the form 3^k*p, where 1 <= k <= 6 and p is a prime different from 3.

Table of values

n a(n)
1 6
2 15
3 18
4 21
5 33
6 39
7 45
8 51
9 54
10 57
11 63
12 69
13 87
14 93
15 99
16 111
17 117
18 123
19 129
20 135
21 141
22 153
23 159
24 162
25 171
26 177
27 183
28 189
29 201
30 207
31 213
32 219
33 237
34 249
35 261
36 267
37 279
38 291
39 297
40 303
41 309
42 321
43 327
44 333
45 339
46 351
47 369
48 381
49 387
50 393
51 405
52 411
53 417
54 423
55 447

List of values

[6, 15, 18, 21, 33, 39, 45, 51, 54, 57, 63, 69, 87, 93, 99, 111, 117, 123, 129, 135, 141, 153, 159, 162, 171, 177, 183, 189, 201, 207, 213, 219, 237, 249, 261, 267, 279, 291, 297, 303, 309, 321, 327, 333, 339, 351, 369, 381, 387, 393, 405, 411, 417, 423, 447]