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A064865 as a simple table

na(n)
11
22
31
45
51
67
714
86
915
1025
1111
1223
1336
1414
1529
1645
1713
1831
1950
206
2127
2249
2372
2415
2540
2666
2793
2821
2950
3080
31111
3222
3355
3489
35124
3616
3753
3891
39130
401
4142
4284
43127
44171
4520
4666
47113
48161
49210
5035
5186
52138
53191
54245
5544
56100
57157
58215
59274
6045
61106
62168
63231
64295
6536

[1,2,1,5,1,7,14,6,15,25,11,23,36,14,29,45,13,31,
 50,6,27,49,72,15,40,66,93,21,50,80,111,22,55,89,
 124,16,53,91,130,1,42,84,127,171,20,66,113,161,
 210,35,86,138,191,245,44,100,157,215,274,45,106,
 168,231,295,36]