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.

A240749 Numbers n such that prime(n)^2 + prime(n+1)^2 is a semiprime.

Table of values

n a(n)
1 2
2 3
3 6
4 14
5 30
6 35
7 37
8 39
9 41
10 46
11 52
12 57
13 68
14 81
15 82
16 97
17 101
18 104
19 112
20 123
21 126
22 145
23 154
24 175
25 189
26 195
27 209
28 215
29 221
30 222
31 259
32 264
33 272
34 276
35 308
36 312
37 314
38 343
39 357
40 367
41 370
42 373
43 389
44 398
45 399
46 403
47 411
48 416
49 418
50 425
51 432
52 436
53 447
54 456
55 462
56 471
57 473
58 477
59 485
60 487
61 489
62 499
63 509
64 520
65 538
66 547

List of values

[2, 3, 6, 14, 30, 35, 37, 39, 41, 46, 52, 57, 68, 81, 82, 97, 101, 104, 112, 123, 126, 145, 154, 175, 189, 195, 209, 215, 221, 222, 259, 264, 272, 276, 308, 312, 314, 343, 357, 367, 370, 373, 389, 398, 399, 403, 411, 416, 418, 425, 432, 436, 447, 456, 462, 471, 473, 477, 485, 487, 489, 499, 509, 520, 538, 547]

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

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