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.

A108632 Semiprimes with prime digits (only digits 2,3,5,7 in semiprimes).

Table of values

n a(n)
1 22
2 25
3 33
4 35
5 55
6 57
7 77
8 235
9 237
10 253
11 323
12 327
13 335
14 355
15 377
16 527
17 533
18 535
19 537
20 553
21 573
22 723
23 737
24 753
25 755
26 2227
27 2253
28 2257
29 2323
30 2327
31 2335
32 2353
33 2533
34 2537
35 2573
36 2577
37 2722
38 2723
39 2733
40 2735
41 2757
42 2773
43 3223
44 3227
45 3233
46 3235
47 3273
48 3277

List of values

[22, 25, 33, 35, 55, 57, 77, 235, 237, 253, 323, 327, 335, 355, 377, 527, 533, 535, 537, 553, 573, 723, 737, 753, 755, 2227, 2253, 2257, 2323, 2327, 2335, 2353, 2533, 2537, 2573, 2577, 2722, 2723, 2733, 2735, 2757, 2773, 3223, 3227, 3233, 3235, 3273, 3277]

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

Content is available under The OEIS End-User License Agreement.