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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.

A114034 Let f(n) be the number of sequences of 1's and 2's which sum to n. Sequence contains the string of sequences.

Table of values

n a(n)
1 1
2 2
3 11
4 12
5 21
6 111
7 22
8 112
9 121
10 211
11 1111
12 122
13 212
14 221
15 1112
16 1121
17 1211
18 2111
19 11111
20 222
21 1122
22 1212
23 1221
24 2112
25 2121
26 2211
27 11112
28 11121
29 11211
30 12111
31 21111
32 111111
33 1222
34 2122
35 2212
36 2221
37 11122
38 11212
39 11221
40 12112
41 12121
42 12211
43 21112
44 21121
45 21211
46 22111
47 111112
48 111121
49 111211
50 112111
51 121111
52 211111
53 1111111

List of values

[1, 2, 11, 12, 21, 111, 22, 112, 121, 211, 1111, 122, 212, 221, 1112, 1121, 1211, 2111, 11111, 222, 1122, 1212, 1221, 2112, 2121, 2211, 11112, 11121, 11211, 12111, 21111, 111111, 1222, 2122, 2212, 2221, 11122, 11212, 11221, 12112, 12121, 12211, 21112, 21121, 21211, 22111, 111112, 111121, 111211, 112111, 121111, 211111, 1111111]

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

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