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A348980 as a simple table

na(n)
10
21
31
45
51
69
71
817
98
1013
111
1237
131
1417
1515
1649
171
1851
191
2057
2119
2225
231
24117
2514
2629
2743
2877
291
30105
311
32129
3327
3437
3523
36191
371
3841
3931
40185
411
42141
431
44117
4599
4649
471
48325
4920
50117
5139
52137
531
54237
5531
56253
5743
5861
591
60405
611
6265
63131
64321
6535
66213
671
68177
6951
70209
711
72579
731
7477
75145
76197
7735
78249
791
80521

[0,1,1,5,1,9,1,17,8,13,1,37,1,17,15,49,1,51,1,57,
 19,25,1,117,14,29,43,77,1,105,1,129,27,37,23,191,
 1,41,31,185,1,141,1,117,99,49,1,325,20,117,39,137,
 1,237,31,253,43,61,1,405,1,65,131,321,35,213,1,
 177,51,209,1,579,1,77,145,197,35,249,1,521]