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A300948 as a simple table

na(n)
12
21
33
44
56
65
77
88
910
109
1111
1212
1314
1413
1515
1632
1734
1833
1935
2036
2138
2237
2339
2440
2542
2641
2743
2844
2946
3045
3147
3216
3318
3417
3519
3620
3722
3821
3923
4024
4126
4225
4327
4428
4530
4629
4731
4848
4950
5049
5151
5252
5354
5453
5555
5656
5758
5857
5959
6060
6162
6261
6363
6464
6566
6665
6767

[2,1,3,4,6,5,7,8,10,9,11,12,14,13,15,32,34,33,35,
 36,38,37,39,40,42,41,43,44,46,45,47,16,18,17,19,
 20,22,21,23,24,26,25,27,28,30,29,31,48,50,49,51,
 52,54,53,55,56,58,57,59,60,62,61,63,64,66,65,67]