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.

A133478 a(n) = smallest semiprime s such that s + n is the next semiprime and there is no prime between s and s + n.

Table of values

n a(n)
1 9
2 49
3 62
4 403
5 341
6 843
7 6722
8 3473
9 2869
10 14059
11 18467
12 26603
13 166126
14 41779
15 74491
16 192061
17 463161
18 226489
19 344119
20 517421
21 943606
22 2171131
23 4577519
24 584213
25 2560177
26 4356633
27 8367139
28 11174753
29 13191293
30 7319797
31 27841051
32 10644122
33 13683034
34 29492893
35 47735342
36 26837363
37 63305661
38 90455097
39 189662206
40 120175651

List of values

[9, 49, 62, 403, 341, 843, 6722, 3473, 2869, 14059, 18467, 26603, 166126, 41779, 74491, 192061, 463161, 226489, 344119, 517421, 943606, 2171131, 4577519, 584213, 2560177, 4356633, 8367139, 11174753, 13191293, 7319797, 27841051, 10644122, 13683034, 29492893, 47735342, 26837363, 63305661, 90455097, 189662206, 120175651]

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

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