A289675 - cp's OEIS frontend

A289675 Consider the Post tag system described in A284116 (but adapted to the alphabet {1,2}) ; sequence lists the words that terminate in the empty word.

n	a(n)
1	1
2	2
3	11
4	12
5	111
6	112
7	121
8	122
9	1111
10	1121
11	1211
12	1221
13	2111
14	2121
15	2211
16	2221
17	11111
18	11112
19	11121
20	11122
21	11211
22	11212
23	11221
24	11222
25	12111
26	12112
27	12121
28	12122
29	12211
30	12212
31	12221
32	12222
33	111111
34	111112
35	111121
36	111122
37	112111
38	112112
39	112121
40	112122
41	121111
42	121112
43	121121
44	121122
45	122111
46	122112
47	122121
48	122122

[1, 2, 11, 12, 111, 112, 121, 122, 1111, 1121, 1211, 1221, 2111, 2121, 2211, 2221, 11111, 11112, 11121, 11122, 11211, 11212, 11221, 11222, 12111, 12112, 12121, 12122, 12211, 12212, 12221, 12222, 111111, 111112, 111121, 111122, 112111, 112112, 112121, 112122, 121111, 121112, 121121, 121122, 122111, 122112, 122121, 122122]

cp's OEIS Frontend

A289675 Consider the Post tag system described in A284116 (but adapted to the alphabet {1,2}) ; sequence lists the words that terminate in the empty word.

Table of values

List of values