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A075881 as a simple table

na(n)
12
25
37
417
59
641
731
818
97
1046
117
12197
1326
14281
1543
16130
1718
18170
1973
2074
2191
22120
2344
24110
2560
2646
2781
28460
2944
3062
3150
32620
3380
34712
35571
36812
3738
38108
3980
4010
4196
42386
43126
441280
4574
461412
47326
48138
4962
5067
51114
5226
5371
542030
553171
5671
57239
58230
593711
607699

[2,5,7,17,9,41,31,18,7,46,7,197,26,281,43,130,18,
 170,73,74,91,120,44,110,60,46,81,460,44,62,50,620,
 80,712,571,812,38,108,80,10,96,386,126,1280,74,
 1412,326,138,62,67,114,26,71,2030,3171,71,239,230,
 3711,7699]