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A181692 as a simple table

na(n)
02
13
23
34
46
56
68
78
814
912
1014
1113
1220
1314
1418
1524
1622
1718
1820
1920
2038
2124
2242
2328
2432
2532
2650
2759
2834
2932
3044
3132
3238
3338
3436
3540
3648
3742
3840
3945
4048
4145
4256
4345
4454
4548
4676
4752
4868
4966
50100
5189
5280
5374
5480
5557
5666
5778
5898
5983
60162
6162
62166
6377
6466
6577
6672
6776
6874
69153
7080
7189
7286
7377
7494
7583
7678
7788
78110
79115
8084

[2,3,3,4,6,6,8,8,14,12,14,13,20,14,18,24,22,18,20,
 20,38,24,42,28,32,32,50,59,34,32,44,32,38,38,36,
 40,48,42,40,45,48,45,56,45,54,48,76,52,68,66,100,
 89,80,74,80,57,66,78,98,83,162,62,166,77,66,77,72,
 76,74,153,80,89,86,77,94,83,78,88,110,115,84]