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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.

A324474 Nonzero ternary words such that any non-initial 1 is preceded by 0, and any non-initial 2 is preceded by 00.

Table of values

n a(n)
1 1
2 2
3 10
4 20
5 100
6 101
7 200
8 201
9 1000
10 1001
11 1002
12 1010
13 2000
14 2001
15 2002
16 2010
17 10000
18 10001
19 10002
20 10010
21 10020
22 10100
23 10101
24 20000
25 20001
26 20002
27 20010
28 20020
29 20100
30 20101
31 100000
32 100001
33 100002
34 100010
35 100020
36 100100
37 100101
38 100200
39 100201

List of values

[1, 2, 10, 20, 100, 101, 200, 201, 1000, 1001, 1002, 1010, 2000, 2001, 2002, 2010, 10000, 10001, 10002, 10010, 10020, 10100, 10101, 20000, 20001, 20002, 20010, 20020, 20100, 20101, 100000, 100001, 100002, 100010, 100020, 100100, 100101, 100200, 100201]

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

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