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| n | a(n) |
|---|---|
| 1 | 3 |
| 2 | 19 |
| 3 | 631 |
| 4 | 1303 |
| 5 | 6571 |
| 6 | 14653 |
| 7 | 20749 |
| 8 | 38431 |
| 9 | 331801 |
| 10 | 457003 |
| 11 | 1048609 |
| 12 | 1679653 |
| 13 | 3748141 |
| 14 | 4879729 |
| 15 | 12960061 |
| 16 | 22667191 |
| 17 | 26873929 |
| 18 | 29986651 |
| 19 | 35153119 |
| 20 | 62742331 |
| 21 | 65610091 |
| 22 | 108243319 |
| 23 | 131079709 |
| 24 | 200534041 |
| 25 | 252047503 |
| 26 | 294500053 |
| 27 | 454372003 |
| 28 | 466949029 |
| 29 | 639129121 |
[3,19,631,1303,6571,14653,20749,38431,331801, 457003,1048609,1679653,3748141,4879729,12960061, 22667191,26873929,29986651,35153119,62742331, 65610091,108243319,131079709,200534041,252047503, 294500053,454372003,466949029,639129121] |