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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.

A174798 Numbers n such that 2*prime(n) and 2*prime(n+1) are consecutive semiprimes.

Table of values

n a(n)
1 1
2 3
3 10
4 33
5 43
6 49
7 50
8 57
9 63
10 100
11 113
12 120
13 131
14 140
15 149
16 159
17 173
18 195
19 206
20 224
21 230
22 277
23 284
24 303
25 315
26 320
27 332
28 366
29 373
30 394
31 395
32 401
33 448
34 463
35 469
36 471
37 473
38 477
39 483
40 484
41 492
42 513
43 524
44 530
45 534
46 537
47 543
48 555
49 558
50 576
51 577
52 592
53 600
54 608

List of values

[1, 3, 10, 33, 43, 49, 50, 57, 63, 100, 113, 120, 131, 140, 149, 159, 173, 195, 206, 224, 230, 277, 284, 303, 315, 320, 332, 366, 373, 394, 395, 401, 448, 463, 469, 471, 473, 477, 483, 484, 492, 513, 524, 530, 534, 537, 543, 555, 558, 576, 577, 592, 600, 608]

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

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