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| n | a(n) |
|---|---|
| 1 | 66 |
| 2 | 1609 |
| 3 | 13946 |
| 4 | 71115 |
| 5 | 263794 |
| 6 | 791381 |
| 7 | 2039274 |
| 8 | 4686391 |
| 9 | 9847970 |
| 10 | 19258689 |
| 11 | 35501146 |
| 12 | 62284739 |
| 13 | 104779986 |
| 14 | 170013325 |
| 15 | 267327434 |
| 16 | 408912111 |
| 17 | 610410754 |
| 18 | 891607481 |
| 19 | 1277199930 |
| 20 | 1797662779 |
| 21 | 2490207026 |
| 22 | 3399840069 |
| 23 | 4580531626 |
[66,1609,13946,71115,263794,791381,2039274, 4686391,9847970,19258689,35501146,62284739, 104779986,170013325,267327434,408912111,610410754, 891607481,1277199930,1797662779,2490207026, 3399840069,4580531626] |