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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.

A090530 Least multiple k of prime(n) such that (k-1,k+1) forms a twin prime pair, or 0 if no such number exists.

Table of values

n a(n)
1 4
2 6
3 30
4 42
5 198
6 312
7 102
8 228
9 138
10 348
11 1302
12 1998
13 1230
14 1032
15 282
16 6360
17 1062
18 15738
19 1608
20 1278
21 6132
22 10428
23 4482
24 4272
25 11058
26 4242
27 618
28 642
29 5232
30 2712
31 18288
32 3930
33 822
34 1668
35 1788
36 11778
37 3768
38 5868
39 5010
40 9342
41 23628
42 3258
43 17190

List of values

[4, 6, 30, 42, 198, 312, 102, 228, 138, 348, 1302, 1998, 1230, 1032, 282, 6360, 1062, 15738, 1608, 1278, 6132, 10428, 4482, 4272, 11058, 4242, 618, 642, 5232, 2712, 18288, 3930, 822, 1668, 1788, 11778, 3768, 5868, 5010, 9342, 23628, 3258, 17190]

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

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