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.

A263990 Nonsquare numbers k such that k and k+1 are semiprimes.

Table of values

n a(n)
1 14
2 21
3 33
4 34
5 38
6 57
7 85
8 86
9 93
10 94
11 118
12 122
13 133
14 141
15 142
16 145
17 158
18 177
19 201
20 202
21 205
22 213
23 214
24 217
25 218
26 253
27 298
28 301
29 302
30 326
31 334
32 381
33 393
34 394
35 445
36 446
37 453
38 481
39 501
40 514
41 526
42 537
43 542
44 553
45 565
46 622
47 633
48 634
49 694
50 697
51 698
52 706
53 717
54 745
55 766
56 778
57 793
58 802
59 817
60 842
61 865
62 878

List of values

[14, 21, 33, 34, 38, 57, 85, 86, 93, 94, 118, 122, 133, 141, 142, 145, 158, 177, 201, 202, 205, 213, 214, 217, 218, 253, 298, 301, 302, 326, 334, 381, 393, 394, 445, 446, 453, 481, 501, 514, 526, 537, 542, 553, 565, 622, 633, 634, 694, 697, 698, 706, 717, 745, 766, 778, 793, 802, 817, 842, 865, 878]

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

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