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A181885 as a simple table

na(n)
12
21
31
42
52
63
74
86
98
1012
1118
1227
1340
1460
1591
16138
17210
18321
19492
20756
211166
221800
232786
244320
256710
2610440
2716267
2825380
2939650
3062017
3197108
32152214
33238824
34375060
35589521
36927369
371459960
382300100

[2,1,1,2,2,3,4,6,8,12,18,27,40,60,91,138,210,321,
 492,756,1166,1800,2786,4320,6710,10440,16267,
 25380,39650,62017,97108,152214,238824,375060,
 589521,927369,1459960,2300100]