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A181805 as a simple table

na(n)
11
22
33
43
55
66
76
87
96
107
118
128
138
1410
1511
1614
179
189
1912
2014
2119
2215
2320
2421
2521
2620
2715
2822
2922
3022
3121
3223
3322
3417
3523
3623
3723
3824
3925
4024
4125
4223
4323
4425
4528
4625
4727
4827
4931
5022
5127
5226
5330
5418
5529
5625
5732
5833
5928
6029
6128
6235
6325
6433
6534
6631
6731
6838
6937

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