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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 3 |
| 3 | 7 |
| 4 | 9 |
| 5 | 21 |
| 6 | 51 |
| 7 | 483 |
| 8 | 687 |
| 9 | 919 |
| 10 | 1095 |
| 11 | 1395 |
| 12 | 3117 |
| 13 | 3649 |
| 14 | 25329 |
| 15 | 46487 |
| 16 | 47963 |
| 17 | 65541 |
| 18 | 71547 |
| 19 | 182949 |
| 20 | 228057 |
| 21 | 231483 |
| 22 | 759747 |
| 23 | 2420481 |
| 24 | 3156489 |
| 25 | 3781071 |
| 26 | 5290915 |
[1,3,7,9,21,51,483,687,919,1095,1395,3117,3649, 25329,46487,47963,65541,71547,182949,228057, 231483,759747,2420481,3156489,3781071,5290915] |