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| n | a(n) |
|---|---|
| 1 | 7 |
| 2 | 49 |
| 3 | 229 |
| 4 | 801 |
| 5 | 2297 |
| 6 | 5699 |
| 7 | 12657 |
| 8 | 25753 |
| 9 | 48811 |
| 10 | 87253 |
| 11 | 148501 |
| 12 | 242425 |
| 13 | 381837 |
| 14 | 583031 |
| 15 | 866369 |
| 16 | 1256913 |
| 17 | 1785103 |
| 18 | 2487481 |
| 19 | 3407461 |
| 20 | 4596145 |
| 21 | 6113185 |
| 22 | 8027691 |
| 23 | 10419185 |
| 24 | 13378601 |
| 25 | 17009331 |
| 26 | 21428317 |
| 27 | 26767189 |
| 28 | 33173449 |
| 29 | 40811701 |
| 30 | 49864927 |
[7,49,229,801,2297,5699,12657,25753,48811,87253, 148501,242425,381837,583031,866369,1256913, 1785103,2487481,3407461,4596145,6113185,8027691, 10419185,13378601,17009331,21428317,26767189, 33173449,40811701,49864927] |