A072427 - OEIS

A072427 as a simple table

n	a(n)
1	0
2	2
3	4
4	6
5	8
6	10
7	11
8	12
9	14
10	16
11	18
12	101
13	141
14	161
15	181
16	198
17	201
18	221
19	241
20	261
21	281
22	1001
23	1818
24	1838
25	1858
26	1878
27	1898
28	1918
29	1938
30	1958
31	1978
32	1998
33	2981
34	10001
35	10201
36	10401
37	10601
38	10801
39	11001
40	11201
41	11401
42	11601
43	11801
44	18018
45	19998

[0,2,4,6,8,10,11,12,14,16,18,101,141,161,181,198, 201,221,241,261,281,1001,1818,1838,1858,1878,1898, 1918,1938,1958,1978,1998,2981,10001,10201,10401, 10601,10801,11001,11201,11401,11601,11801,18018, 19998]