A127423 - cp's OEIS frontend

A127423 a(1) = 1; for n > 1, a(n) = n concatenated with n - 1.

n	a(n)
1	1
2	21
3	32
4	43
5	54
6	65
7	76
8	87
9	98
10	109
11	1110
12	1211
13	1312
14	1413
15	1514
16	1615
17	1716
18	1817
19	1918
20	2019
21	2120
22	2221
23	2322
24	2423
25	2524
26	2625
27	2726
28	2827
29	2928
30	3029
31	3130
32	3231
33	3332
34	3433
35	3534
36	3635
37	3736
38	3837
39	3938
40	4039
41	4140
42	4241
43	4342
44	4443
45	4544
46	4645

[1, 21, 32, 43, 54, 65, 76, 87, 98, 109, 1110, 1211, 1312, 1413, 1514, 1615, 1716, 1817, 1918, 2019, 2120, 2221, 2322, 2423, 2524, 2625, 2726, 2827, 2928, 3029, 3130, 3231, 3332, 3433, 3534, 3635, 3736, 3837, 3938, 4039, 4140, 4241, 4342, 4443, 4544, 4645]

cp's OEIS Frontend

A127423 a(1) = 1; for n > 1, a(n) = n concatenated with n - 1.

Table of values

List of values