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A111164 as a simple table

na(n)
12
23
35
45
56
67
76
87
99
109
116
1210
136
149
1512
169
176
1813
196
2012
2113
229
236
2414
2510
269
2713
2813
296
3017
316
3211
3313
349
3513
3618
376
389
3913
4016
416
4218
436
4413
4520
469
476
4818
4910
5015
5113
5213
536
5419
5514
5616
5713
589
596
6023
616
629
6320
6413
6514
6619
676
6813
6913
7020
716
7223
736
749
7520
7613
7714
7819
796
8020
8117
829
836

[2,3,5,5,6,7,6,7,9,9,6,10,6,9,12,9,6,13,6,12,13,9,
 6,14,10,9,13,13,6,17,6,11,13,9,13,18,6,9,13,16,6,
 18,6,13,20,9,6,18,10,15,13,13,6,19,14,16,13,9,6,
 23,6,9,20,13,14,19,6,13,13,20,6,23,6,9,20,13,14,
 19,6,20,17,9,6]