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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.

A171953 Positions of 3's in A181391.

Table of values

n a(n)
1 20
2 22
3 28
4 33
5 38
6 46
7 49
8 50
9 61
10 68
11 70
12 76
13 78
14 86
15 94
16 103
17 201
18 204
19 205
20 217
21 230
22 256
23 259
24 260
25 281
26 327
27 369
28 391
29 394
30 395
31 403
32 422
33 492
34 550
35 575
36 583
37 672
38 675
39 676
40 740
41 804
42 815
43 843
44 1103
45 1165
46 1488
47 1491
48 1492
49 1543
50 1668

List of values

[20, 22, 28, 33, 38, 46, 49, 50, 61, 68, 70, 76, 78, 86, 94, 103, 201, 204, 205, 217, 230, 256, 259, 260, 281, 327, 369, 391, 394, 395, 403, 422, 492, 550, 575, 583, 672, 675, 676, 740, 804, 815, 843, 1103, 1165, 1488, 1491, 1492, 1543, 1668]

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

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