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| n | a(n) |
|---|---|
| 1 | 15 |
| 2 | 21 |
| 3 | 95 |
| 4 | 267 |
| 5 | 2369 |
| 6 | 6559 |
| 7 | 8817 |
| 8 | 13705 |
| 9 | 15261 |
| 10 | 21583 |
| 11 | 35981 |
| 12 | 66921 |
| 13 | 113009 |
| 14 | 340891 |
| 15 | 783757 |
| 16 | 872219 |
| 17 | 3058853 |
| 18 | 3586843 |
| 19 | 5835191 |
| 20 | 12345473 |
| 21 | 108994623 |
| 22 | 248706917 |
| 23 | 268749691 |
| 24 | 679956119 |
| 25 | 709239621 |
| 26 | 3648864859 |
| 27 | 3790337723 |
| 28 | 4171420481 |
| 29 | 33955869693 |
| 30 | 34279038379 |
| 31 | 34840796369 |
[15,21,95,267,2369,6559,8817,13705,15261,21583, 35981,66921,113009,340891,783757,872219,3058853, 3586843,5835191,12345473,108994623,248706917, 268749691,679956119,709239621,3648864859, 3790337723,4171420481,33955869693,34279038379, 34840796369] |