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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.

A280389 Odd semiprimes that can be represented as 2p+3q, where p and q are primes.

Table of values

n a(n)
1 15
2 21
3 25
4 35
5 39
6 49
7 55
8 57
9 65
10 77
11 85
12 91
13 93
14 95
15 115
16 119
17 121
18 129
19 133
20 143
21 145
22 155
23 161
24 169
25 183
26 185
27 187
28 203
29 205
30 209
31 215
32 217
33 219
34 221
35 235
36 247
37 253
38 259
39 265
40 287
41 289
42 295
43 299
44 301
45 305
46 309
47 319
48 323
49 327
50 329
51 335
52 341
53 355
54 361
55 365
56 371
57 377
58 391
59 395
60 403

List of values

[15, 21, 25, 35, 39, 49, 55, 57, 65, 77, 85, 91, 93, 95, 115, 119, 121, 129, 133, 143, 145, 155, 161, 169, 183, 185, 187, 203, 205, 209, 215, 217, 219, 221, 235, 247, 253, 259, 265, 287, 289, 295, 299, 301, 305, 309, 319, 323, 327, 329, 335, 341, 355, 361, 365, 371, 377, 391, 395, 403]

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

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