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A048213 as a simple table

na(n)
12
21
34
46
58
69
712
815
916
1020
1122
1224
1325
1426
1532
1633
1734
1837
1938
2041
2145
2247
2348
2453
2556
2659
2761
2862
2964
3068
3169
3274
3376
3477
3578
3681
3784
3887
3988
4089
4196
4298
43100
44103
45105
46106
47110
48111
49114
50119
51121
52127
53128
54130
55131
56135
57138

[2,1,4,6,8,9,12,15,16,20,22,24,25,26,32,33,34,37,
 38,41,45,47,48,53,56,59,61,62,64,68,69,74,76,77,
 78,81,84,87,88,89,96,98,100,103,105,106,110,111,
 114,119,121,127,128,130,131,135,138]