A304238 - cp's OEIS frontend

A304238 a(n) is the smallest positive integer not yet in the sequence that is obtained when the first and last digits of a(n-1) are exchanged and used in a(n) in the exchanged order (and necessarily adjacent); a(1)=10.

n	a(n)
1	10
2	101
3	11
4	110
5	201
6	12
7	21
8	112
9	121
10	111
11	113
12	31
13	13
14	131
15	114
16	41
17	14
18	141
19	115
20	51
21	15
22	151
23	116
24	61
25	16
26	161
27	117
28	71
29	17
30	171
31	118
32	81
33	18
34	181
35	119
36	91
37	19
38	191
39	211
40	120
41	301
42	130
43	401
44	140
45	501
46	150
47	601
48	160
49	701
50	170
51	801
52	180
53	901
54	190
55	1001
56	311
57	132
58	210
59	102
60	212
61	22
62	122
63	213
64	32
65	23
66	232

[10, 101, 11, 110, 201, 12, 21, 112, 121, 111, 113, 31, 13, 131, 114, 41, 14, 141, 115, 51, 15, 151, 116, 61, 16, 161, 117, 71, 17, 171, 118, 81, 18, 181, 119, 91, 19, 191, 211, 120, 301, 130, 401, 140, 501, 150, 601, 160, 701, 170, 801, 180, 901, 190, 1001, 311, 132, 210, 102, 212, 22, 122, 213, 32, 23, 232]

cp's OEIS Frontend

A304238 a(n) is the smallest positive integer not yet in the sequence that is obtained when the first and last digits of a(n-1) are exchanged and used in a(n) in the exchanged order (and necessarily adjacent); a(1)=10.

Table of values

List of values