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A121664 as a simple table

na(n)
11
22
33
45
54
66
711
810
99
107
118
1212
1323
1422
1521
1619
1720
1818
1913
2014
2115
2217
2316
2424
2547
2646
2745
2843
2944
3042
3137
3238
3339
3441
3540
3636
3725
3826
3927
4029
4128
4230
4335
4434
4533
4631
4732
4848
4995
5094
5193
5291
5392
5490
5585
5686
5787
5889
5988
6084
6173
6274
6375
6477
6576
6678
6783
6882
6981
7079
7180
7272

[1,2,3,5,4,6,11,10,9,7,8,12,23,22,21,19,20,18,13,
 14,15,17,16,24,47,46,45,43,44,42,37,38,39,41,40,
 36,25,26,27,29,28,30,35,34,33,31,32,48,95,94,93,
 91,92,90,85,86,87,89,88,84,73,74,75,77,76,78,83,
 82,81,79,80,72]