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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.

A016105 Blum integers: numbers of the form p * q where p and q are distinct primes congruent to 3 (mod 4).

Table of values

n a(n)
1 21
2 33
3 57
4 69
5 77
6 93
7 129
8 133
9 141
10 161
11 177
12 201
13 209
14 213
15 217
16 237
17 249
18 253
19 301
20 309
21 321
22 329
23 341
24 381
25 393
26 413
27 417
28 437
29 453
30 469
31 473
32 489
33 497
34 501
35 517
36 537
37 553
38 573
39 581
40 589
41 597
42 633
43 649
44 669
45 681
46 713
47 717
48 721
49 737
50 749
51 753
52 781
53 789

List of values

[21, 33, 57, 69, 77, 93, 129, 133, 141, 161, 177, 201, 209, 213, 217, 237, 249, 253, 301, 309, 321, 329, 341, 381, 393, 413, 417, 437, 453, 469, 473, 489, 497, 501, 517, 537, 553, 573, 581, 589, 597, 633, 649, 669, 681, 713, 717, 721, 737, 749, 753, 781, 789]