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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.

A165986 Even semiprimes n such that (the largest prime factor of n) + 4 is prime.

Table of values

n a(n)
1 6
2 14
3 26
4 38
5 74
6 86
7 134
8 158
9 194
10 206
11 218
12 254
13 326
14 386
15 446
16 458
17 554
18 614
19 626
20 698
21 758
22 794
23 878
24 914
25 926
26 974
27 998
28 1226
29 1286
30 1346
31 1478
32 1514
33 1538
34 1646
35 1706
36 1718
37 1754
38 1766
39 1814
40 1874
41 1934
42 2018
43 2174
44 2186
45 2426
46 2558
47 2594
48 2606

List of values

[6, 14, 26, 38, 74, 86, 134, 158, 194, 206, 218, 254, 326, 386, 446, 458, 554, 614, 626, 698, 758, 794, 878, 914, 926, 974, 998, 1226, 1286, 1346, 1478, 1514, 1538, 1646, 1706, 1718, 1754, 1766, 1814, 1874, 1934, 2018, 2174, 2186, 2426, 2558, 2594, 2606]

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

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