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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.

A370395 Numbers k that are neither squarefree nor prime powers sandwiched between twin primes.

Table of values

n a(n)
1 12
2 18
3 60
4 72
5 108
6 150
7 180
8 192
9 198
10 228
11 240
12 270
13 312
14 348
15 420
16 432
17 522
18 600
19 660
20 810
21 828
22 882
23 1020
24 1032
25 1050
26 1062
27 1092
28 1152
29 1278
30 1320
31 1428
32 1452
33 1488
34 1608
35 1620
36 1668
37 1788
38 1872
39 1932
40 1950
41 1998
42 2028
43 2088
44 2112
45 2142
46 2268
47 2340
48 2550

List of values

[12, 18, 60, 72, 108, 150, 180, 192, 198, 228, 240, 270, 312, 348, 420, 432, 522, 600, 660, 810, 828, 882, 1020, 1032, 1050, 1062, 1092, 1152, 1278, 1320, 1428, 1452, 1488, 1608, 1620, 1668, 1788, 1872, 1932, 1950, 1998, 2028, 2088, 2112, 2142, 2268, 2340, 2550]

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

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