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A064680 as a simple table

na(n)
00
12
21
36
42
510
63
714
84
918
105
1122
126
1326
147
1530
168
1734
189
1938
2010
2142
2211
2346
2412
2550
2613
2754
2814
2958
3015
3162
3216
3366
3417
3570
3618
3774
3819
3978
4020
4182
4221
4386
4422
4590
4623
4794
4824
4998
5025
51102
5226
53106
5427
55110
5628
57114
5829
59118
6030
61122
6231
63126
6432
65130
6633
67134
6834
69138
7035

[0,2,1,6,2,10,3,14,4,18,5,22,6,26,7,30,8,34,9,38,
 10,42,11,46,12,50,13,54,14,58,15,62,16,66,17,70,
 18,74,19,78,20,82,21,86,22,90,23,94,24,98,25,102,
 26,106,27,110,28,114,29,118,30,122,31,126,32,130,
 33,134,34,138,35]