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A031998 as a simple table

na(n)
11
22
33
44
56
67
78
89
912
1013
1118
1221
1322
1424
1525
1626
1727
1836
1939
2040
2154
2263
2366
2467
2572
2675
2776
2878
2979
3080
3181
32108
33117
34120
35121
36162
37189
38198
39201
40202
41216
42225
43228
44229
45234
46237
47238
48240
49241
50242
51243
52324
53351
54360
55363

[1,2,3,4,6,7,8,9,12,13,18,21,22,24,25,26,27,36,39,
 40,54,63,66,67,72,75,76,78,79,80,81,108,117,120,
 121,162,189,198,201,202,216,225,228,229,234,237,
 238,240,241,242,243,324,351,360,363]