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A075888 as a simple table

na(n)
31
43
52
65
73
87
913
105
1117
1213
137
1415
1525
1628
1710
1832
1923
2012
2138
2227
2343
2462
2533
2617
2735
2818
2937
30140
3143
3267
3323
34120
3525
3677
3780
3855
3985
4088
4130
42155
4332
4465
4533
46205
47217
4875
4938
5077
51118
5240
53205
54127
55130
56133
5745
58137
5993
6047
61240
62350
63103
6452
65105
66378
67167
68285

[1,3,2,5,3,7,13,5,17,13,7,15,25,28,10,32,23,12,38,
 27,43,62,33,17,35,18,37,140,43,67,23,120,25,77,80,
 55,85,88,30,155,32,65,33,205,217,75,38,77,118,40,
 205,127,130,133,45,137,93,47,240,350,103,52,105,
 378,167,285]