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.

A085184 Sequence A085183 shown in base 4. Quaternary code for binary trees.

Table of values

n a(n)
1 0
2 1
3 2
4 11
5 12
6 21
7 22
8 30
9 111
10 112
11 121
12 122
13 130
14 211
15 212
16 221
17 222
18 230
19 301
20 302
21 310
22 320
23 1111
24 1112
25 1121
26 1122
27 1130
28 1211
29 1212
30 1221
31 1222
32 1230
33 1301
34 1302
35 1310
36 1320
37 2111
38 2112
39 2121
40 2122
41 2130
42 2211
43 2212
44 2221
45 2222
46 2230
47 2301
48 2302

List of values

[0, 1, 2, 11, 12, 21, 22, 30, 111, 112, 121, 122, 130, 211, 212, 221, 222, 230, 301, 302, 310, 320, 1111, 1112, 1121, 1122, 1130, 1211, 1212, 1221, 1222, 1230, 1301, 1302, 1310, 1320, 2111, 2112, 2121, 2122, 2130, 2211, 2212, 2221, 2222, 2230, 2301, 2302]

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

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