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A031999 as a simple table

na(n)
11
22
33
44
55
68
79
810
912
1013
1114
1215
1316
1420
1521
1632
1736
1837
1940
2041
2142
2248
2352
2453
2556
2657
2758
2860
2961
3062
3163
3264
3380
3484
3585
36128
37144
38148
39149
40160
41164
42165
43168
44169
45170
46192
47208
48212
49213
50224
51228
52229
53232
54233
55234
56240

[1,2,3,4,5,8,9,10,12,13,14,15,16,20,21,32,36,37,
 40,41,42,48,52,53,56,57,58,60,61,62,63,64,80,84,
 85,128,144,148,149,160,164,165,168,169,170,192,
 208,212,213,224,228,229,232,233,234,240]