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A001281 as a simple table

na(n)
00
12
21
38
42
514
63
720
84
926
105
1132
126
1338
147
1544
168
1750
189
1956
2010
2162
2211
2368
2412
2574
2613
2780
2814
2986
3015
3192
3216
3398
3417
35104
3618
37110
3819
39116
4020
41122
4221
43128
4422
45134
4623
47140
4824
49146
5025
51152
5226
53158
5427
55164
5628
57170
5829
59176
6030
61182
6231
63188

[0,2,1,8,2,14,3,20,4,26,5,32,6,38,7,44,8,50,9,56,
 10,62,11,68,12,74,13,80,14,86,15,92,16,98,17,104,
 18,110,19,116,20,122,21,128,22,134,23,140,24,146,
 25,152,26,158,27,164,28,170,29,176,30,182,31,188]