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A107821 as a simple table

na(n)
11
29
32
46
55
67
74
812
911
108
1110
1217
133
1416
1514
1613
1715
1819
1918
2020
2121
2222
2324
2423
2527
2626
2728
2825
2929
3030
3131
3232
3333
3434
3535
3636
3737
3838
3939
4040
4141
4242
4343
4444
4545
4646
4747
4848
4949
5050
5151
5252
5353
5454
5555
5656
5757
5858
5959
6060
6161

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