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A002730 as a simple table

na(n)
12
21
32
43
54
68
78
818
918
1038
1128
12142
1372
14234
15360
16669
17520
182606
191608
207338
218856
2219370
2316768
2494308
2567556
26216200
27277512
28815310
29662368
304499852
312311468
328465496
3313045076
3431592762
3540937592
36159769394
37103197488
38401912086

[2,1,2,3,4,8,8,18,18,38,28,142,72,234,360,669,520,
 2606,1608,7338,8856,19370,16768,94308,67556,
 216200,277512,815310,662368,4499852,2311468,
 8465496,13045076,31592762,40937592,159769394,
 103197488,401912086]