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A123390 as a simple table

na(n)
11
22
31
43
54
62
71
85
96
103
117
128
134
142
151
169
1710
185
1911
2012
216
223
2313
2414
257
2615
2716
288
294
302
311
3217
3318
349
3519
3620
3710
385
3921
4022
4111
4223
4324
4412
456
463
4725
4826
4913
5027
5128
5214
537
5429
5530
5615
5731
5832
5916
608
614
622
631
6433
6534
6617
6735
6836
6918
709
7137
7238
7319
7439
7540
7620
7710
785
7941
8042
8121

[1,2,1,3,4,2,1,5,6,3,7,8,4,2,1,9,10,5,11,12,6,3,
 13,14,7,15,16,8,4,2,1,17,18,9,19,20,10,5,21,22,11,
 23,24,12,6,3,25,26,13,27,28,14,7,29,30,15,31,32,
 16,8,4,2,1,33,34,17,35,36,18,9,37,38,19,39,40,20,
 10,5,41,42,21]