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A260303 as a simple table

na(n)
13
26
33
49
57
67
77
825
915
1019
1127
1243
1327
1457
1527
1615
1739
1827
1939
2027
2197
22105
2355
2439
25129
2639
2727
2827
29145
3075
31169
3287
3327
34123
3599
36201
37123
38217
3927
40115
4179
42241
43127
44171
4587
46235
47187
48297
49151
50135
5127
52159
53321
5427
55171
5627
5779
58361
59369
60187
6127
62195

[3,6,3,9,7,7,7,25,15,19,27,43,27,57,27,15,39,27,
 39,27,97,105,55,39,129,39,27,27,145,75,169,87,27,
 123,99,201,123,217,27,115,79,241,127,171,87,235,
 187,297,151,135,27,159,321,27,171,27,79,361,369,
 187,27,195]