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.

A242341 Numbers k such that k*10^k - 1 is a semiprime.

Table of values

n a(n)
1 1
2 6
3 20
4 29
5 35
6 40
7 79
8 164
9 185
10 198
11 201
12 218
13 248
14 249
15 251
16 264
17 267
18 274
19 305
20 323
21 339
22 344
23 350
24 362
25 432
26 539

List of values

[1, 6, 20, 29, 35, 40, 79, 164, 185, 198, 201, 218, 248, 249, 251, 264, 267, 274, 305, 323, 339, 344, 350, 362, 432, 539]