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A275667 as a simple table

na(n)
01
13
27
39
47
521
625
727
87
921
1049
1163
1225
1375
14103
1581
167
1721
1849
1963
2049
21147
22175
23189
2425
2575
26175
27225
28103
29309
30409
31243
327
3321
3449
3563
3649
37147
38175
39189
4049
41147
42343
43441
44175
45525
46721
47567
4825
4975
50175
51225
52175
53525
54625
55675
56103
57309
58721

[1,3,7,9,7,21,25,27,7,21,49,63,25,75,103,81,7,21,
 49,63,49,147,175,189,25,75,175,225,103,309,409,
 243,7,21,49,63,49,147,175,189,49,147,343,441,175,
 525,721,567,25,75,175,225,175,525,625,675,103,309,
 721]