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.

A114517 Numbers k such that the k-th heptagonal number is semiprime.

Table of values

n a(n)
1 4
2 5
3 10
4 13
5 14
6 17
7 22
8 26
9 29
10 34
11 41
12 46
13 53
14 61
15 62
16 73
17 74
18 94
19 97
20 101
21 109
22 113
23 118
24 122
25 146
26 158
27 166
28 173
29 178
30 194
31 197
32 218
33 229
34 241
35 257
36 262
37 274
38 277
39 281
40 298
41 314
42 326
43 334
44 353
45 358
46 382
47 389
48 397
49 398
50 409
51 421
52 454
53 458
54 461
55 521
56 538

List of values

[4, 5, 10, 13, 14, 17, 22, 26, 29, 34, 41, 46, 53, 61, 62, 73, 74, 94, 97, 101, 109, 113, 118, 122, 146, 158, 166, 173, 178, 194, 197, 218, 229, 241, 257, 262, 274, 277, 281, 298, 314, 326, 334, 353, 358, 382, 389, 397, 398, 409, 421, 454, 458, 461, 521, 538]