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A171601 as a simple table

na(n)
11
21
33
43
53
66
76
86
96
1010
1110
1210
1310
1410
1515
1615
1715
1815
1915
2010
2121
2221
2321
2421
2521
2615
2721
2828
2928
3028
3128
3228
3321
3428
3528
3636
3736
3836
3936
4036
4128
4236
4336
4428
4545
4645
4745
4845
4945
5028
5145
5245
5328
5445
5555
5655
5755
5855
5955
6045
6155
6255
6345
6455
6555
6666
6766
6866
6966
7066
7155
7266

[1,1,3,3,3,6,6,6,6,10,10,10,10,10,15,15,15,15,15,
 10,21,21,21,21,21,15,21,28,28,28,28,28,21,28,28,
 36,36,36,36,36,28,36,36,28,45,45,45,45,45,28,45,
 45,28,45,55,55,55,55,55,45,55,55,45,55,55,66,66,
 66,66,66,55,66]