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A339541 as a simple table

na(n)
12
23
34
45
56
67
78
89
910
1020
1114
1214
1317
1420
1520
1620
1720
1820
1929
2022
2124
2226
2330
2428
2532
2631
2730
2838
2938
3032
3138
3236
3341
3444
3542
3640
3747
3846
3945
4044
4146
4244
4350
4453
4550
4656
4754
4852
4962
5052
5157
5256
5364
5460
5565
5662
5770
5868
5966
6065
6168
6275
6370
6474
6580
6677
6774
6884
6982
7074
7179
7280
7383
7488
7584
7692

[2,3,4,5,6,7,8,9,10,20,14,14,17,20,20,20,20,20,29,
 22,24,26,30,28,32,31,30,38,38,32,38,36,41,44,42,
 40,47,46,45,44,46,44,50,53,50,56,54,52,62,52,57,
 56,64,60,65,62,70,68,66,65,68,75,70,74,80,77,74,
 84,82,74,79,80,83,88,84,92]