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A166983 as a simple table

na(n)
11
22
34
46
56
66
710
811
911
1012
1114
1217
1318
1416
1522
1622
1723
1822
1922
2026
2129
2230
2331
2427
2534
2635
2732
2834
2938
3039
3142
3238
3346
3444
3547
3646
3746
3851
3948
4053
4154
4248
4358
4457
4557
4661
4758
4862
4965
5062
5160
5270
5369
5470
5573
5670
5770
5876
5978
6072
6181
6282
6383
6480
6578
6687
6786
6889
6990
7091
7184

[1,2,4,6,6,6,10,11,11,12,14,17,18,16,22,22,23,22,
 22,26,29,30,31,27,34,35,32,34,38,39,42,38,46,44,
 47,46,46,51,48,53,54,48,58,57,57,61,58,62,65,62,
 60,70,69,70,73,70,70,76,78,72,81,82,83,80,78,87,
 86,89,90,91,84]