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A057300 as a simple table

na(n)
00
12
21
33
48
510
69
711
84
96
105
117
1212
1314
1413
1515
1632
1734
1833
1935
2040
2142
2241
2343
2436
2538
2637
2739
2844
2946
3045
3147
3216
3318
3417
3519
3624
3726
3825
3927
4020
4122
4221
4323
4428
4530
4629
4731
4848
4950
5049
5151
5256
5358
5457
5559
5652
5754
5853
5955
6060
6162
6261
6363
64128
65130
66129
67131
68136
69138

[0,2,1,3,8,10,9,11,4,6,5,7,12,14,13,15,32,34,33,
 35,40,42,41,43,36,38,37,39,44,46,45,47,16,18,17,
 19,24,26,25,27,20,22,21,23,28,30,29,31,48,50,49,
 51,56,58,57,59,52,54,53,55,60,62,61,63,128,130,
 129,131,136,138]