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A274084 as a simple table

na(n)
115
221
391
4171
5666
6703
7820
81830
91953
103003
113081
124095
137140
147381
1510440
1612720
1714706
1816471
1916653
2018915
2123871
2224976
2330628
2447586
2547895
2648828
2766430
2871631
2979401
3095703
31101475
32104653
33119805
34128778
35148240
36148785
37173166
38191271
39221445

[15,21,91,171,666,703,820,1830,1953,3003,3081,
 4095,7140,7381,10440,12720,14706,16471,16653,
 18915,23871,24976,30628,47586,47895,48828,66430,
 71631,79401,95703,101475,104653,119805,128778,
 148240,148785,173166,191271,221445]