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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.

A173083 Semiprimes q such that q^2+3 and q^2-3 are also semiprimes.

Table of values

n a(n)
1 6
2 226
3 262
4 302
5 314
6 334
7 346
8 382
9 466
10 482
11 514
12 538
13 562
14 734
15 778
16 842
17 866
18 886
19 898
20 926
21 974
22 1006
23 1046
24 1282
25 1306
26 1318
27 1322
28 1438
29 1466
30 1478
31 1574
32 1622
33 1774
34 1822
35 1838
36 1858
37 1894
38 1994
39 2302
40 2342
41 2446
42 2518
43 2578
44 2582
45 2602
46 2638

List of values

[6, 226, 262, 302, 314, 334, 346, 382, 466, 482, 514, 538, 562, 734, 778, 842, 866, 886, 898, 926, 974, 1006, 1046, 1282, 1306, 1318, 1322, 1438, 1466, 1478, 1574, 1622, 1774, 1822, 1838, 1858, 1894, 1994, 2302, 2342, 2446, 2518, 2578, 2582, 2602, 2638]

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

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