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A166737 as a simple table

na(n)
11
23
34
44
56
66
78
88
910
1011
1110
1213
1313
1414
1516
1614
1717
1820
1918
2021
2121
2222
2321
2424
2522
2630
2722
2831
2928
3025
3134
3232
3332
3433
3533
3634
3736
3838
3941
4035
4141
4240
4341
4445
4541
4641
4748
4849
4948
5049
5148
5248
5348
5454
5556
5654
5751
5856
5956
6061
6162
6257
6360
6462
6563
6659
6765
6866
6964
7065
7177
7267

[1,3,4,4,6,6,8,8,10,11,10,13,13,14,16,14,17,20,18,
 21,21,22,21,24,22,30,22,31,28,25,34,32,32,33,33,
 34,36,38,41,35,41,40,41,45,41,41,48,49,48,49,48,
 48,48,54,56,54,51,56,56,61,62,57,60,62,63,59,65,
 66,64,65,77,67]