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.

A108631 Semiprimes with nonprime digits (no digits 2,3,5,7 in semiprimes).

Table of values

n a(n)
1 4
2 6
3 9
4 10
5 14
6 46
7 49
8 69
9 86
10 91
11 94
12 106
13 111
14 118
15 119
16 141
17 146
18 161
19 166
20 169
21 194
22 411
23 446
24 466
25 469
26 481
27 489
28 611
29 614
30 649
31 669
32 681
33 689
34 694
35 698
36 699
37 818
38 841
39 849
40 866
41 869
42 886
43 889
44 898
45 899
46 901
47 914
48 949
49 961
50 989
51 998

List of values

[4, 6, 9, 10, 14, 46, 49, 69, 86, 91, 94, 106, 111, 118, 119, 141, 146, 161, 166, 169, 194, 411, 446, 466, 469, 481, 489, 611, 614, 649, 669, 681, 689, 694, 698, 699, 818, 841, 849, 866, 869, 886, 889, 898, 899, 901, 914, 949, 961, 989, 998]