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A018819 as a simple table

na(n)
01
11
22
32
44
54
66
76
810
910
1014
1114
1220
1320
1426
1526
1636
1736
1846
1946
2060
2160
2274
2374
2494
2594
26114
27114
28140
29140
30166
31166
32202
33202
34238
35238
36284
37284
38330
39330
40390
41390
42450
43450
44524
45524
46598
47598
48692
49692
50786
51786
52900
53900
541014
551014
561154
571154
581294
591294

[1,1,2,2,4,4,6,6,10,10,14,14,20,20,26,26,36,36,46,
 46,60,60,74,74,94,94,114,114,140,140,166,166,202,
 202,238,238,284,284,330,330,390,390,450,450,524,
 524,598,598,692,692,786,786,900,900,1014,1014,
 1154,1154,1294,1294]