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A299441 as a simple table

na(n)
11
22
33
44
55
66
77
88
99
1010
1111
1215
1312
1413
1518
1614
1716
1817
1921
2020
2119
2224
2322
2423
2527
2626
2725
2830
2928
3029
3140
3231
3333
3432
3534
3635
3736
3837
3948
4038
4139
4242
4341
4452
4543
4656
4744
4845
4946
5047
5160
5249
5364
5450
5551
5654
5753
5880
5955
6057
6158
6259
6368
6461
6572
6662
6763

[1,2,3,4,5,6,7,8,9,10,11,15,12,13,18,14,16,17,21,
 20,19,24,22,23,27,26,25,30,28,29,40,31,33,32,34,
 35,36,37,48,38,39,42,41,52,43,56,44,45,46,47,60,
 49,64,50,51,54,53,80,55,57,58,59,68,61,72,62,63]