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A072869 as a simple table

na(n)
21
31
44
51
612
71
88
97
1015
111
1231
131
1418
1513
1624
171
1832
191
2036
2112
2224
231
2491
2512
2631
2714
2856
291
3096
311
3232
3324
3442
3514
3672
371
3836
3918
4093
411
42120
431
4490
4548
4642
471
48140
4915
5044
5132
5272
531
54144
5518
56127
5724
5863
591
60280
611
6254
6342
64104
6520
66168
671
6890
6940
70114
711
72168
731
7490
7557

[1,1,4,1,12,1,8,7,15,1,31,1,18,13,24,1,32,1,36,12,
 24,1,91,12,31,14,56,1,96,1,32,24,42,14,72,1,36,18,
 93,1,120,1,90,48,42,1,140,15,44,32,72,1,144,18,
 127,24,63,1,280,1,54,42,104,20,168,1,90,40,114,1,
 168,1,90,57]