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.

A173477 Semiprimes having no representation of the form semiprime(n)-+n, where semiprime(n) = A001358(n).

Table of values

n a(n)
1 10
2 15
3 25
4 26
5 35
6 38
7 39
8 58
9 65
10 82
11 85
12 87
13 91
14 94
15 118
16 119
17 121
18 123
19 133
20 134
21 142
22 143
23 155
24 166
25 183
26 185
27 201
28 202
29 209
30 213
31 217
32 226
33 237
34 253
35 267
36 274
37 278
38 287
39 295
40 298
41 299
42 301
43 303
44 305
45 314
46 319
47 321
48 339
49 355
50 362
51 371
52 377
53 381
54 395
55 407
56 413
57 415
58 417
59 422
60 427

List of values

[10, 15, 25, 26, 35, 38, 39, 58, 65, 82, 85, 87, 91, 94, 118, 119, 121, 123, 133, 134, 142, 143, 155, 166, 183, 185, 201, 202, 209, 213, 217, 226, 237, 253, 267, 274, 278, 287, 295, 298, 299, 301, 303, 305, 314, 319, 321, 339, 355, 362, 371, 377, 381, 395, 407, 413, 415, 417, 422, 427]

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

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