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| n | a(n) |
|---|---|
| 1 | 99 |
| 2 | 230 |
| 3 | 747 |
| 4 | 2027 |
| 5 | 5420 |
| 6 | 15306 |
| 7 | 42175 |
| 8 | 114513 |
| 9 | 316679 |
| 10 | 874845 |
| 11 | 2397776 |
| 12 | 6596755 |
| 13 | 18184634 |
| 14 | 50001731 |
| 15 | 137513534 |
| 16 | 378580791 |
| 17 | 1041706050 |
| 18 | 2865675286 |
| 19 | 7885936120 |
| 20 | 21700245925 |
| 21 | 59706090387 |
| 22 | 164287119004 |
| 23 | 452064660346 |
| 24 | 1243881032722 |
[99,230,747,2027,5420,15306,42175,114513,316679, 874845,2397776,6596755,18184634,50001731, 137513534,378580791,1041706050,2865675286, 7885936120,21700245925,59706090387,164287119004, 452064660346,1243881032722] |