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.

A336531 A sieve: start with the positive integers. Let a(1)=1. Mark out the following numbers: a(1)+1, a(1)+1+2, a(1)+1+2+3, a(1)+1+2+3+4, ... . The next integer in the list not marked out is 3, so a(2)=3. Mark out the following numbers: a(2)+1, a(2)+1+2, a(2)+1+2+3, a(2)+1+2+3+4, ... . Repeat the procedure for a(3), a(4), a(5), ... .

Table of values

n a(n)
1 1
2 3
3 5
4 10
5 12
6 14
7 19
8 21
9 23
10 28
11 30
12 32
13 52
14 54
15 61
16 63
17 70
18 72
19 86
20 95
21 102
22 104
23 111
24 113
25 142
26 144
27 151
28 153
29 160
30 162
31 169
32 171
33 212
34 221
35 230
36 246
37 268
38 270
39 293
40 300
41 302
42 309
43 311
44 318
45 320
46 327
47 349
48 358
49 360

List of values

[1, 3, 5, 10, 12, 14, 19, 21, 23, 28, 30, 32, 52, 54, 61, 63, 70, 72, 86, 95, 102, 104, 111, 113, 142, 144, 151, 153, 160, 162, 169, 171, 212, 221, 230, 246, 268, 270, 293, 300, 302, 309, 311, 318, 320, 327, 349, 358, 360]