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| n | a(n) |
|---|---|
| 3 | 9 |
| 4 | 64 |
| 5 | 326 |
| 6 | 1433 |
| 7 | 5799 |
| 8 | 22224 |
| 9 | 81987 |
| 10 | 293987 |
| 11 | 1031298 |
| 12 | 3555085 |
| 13 | 12081775 |
| 14 | 40576240 |
| 15 | 134919788 |
| 16 | 444805274 |
| 17 | 1455645411 |
| 18 | 4733022100 |
| 19 | 15302145060 |
| 20 | 49223709597 |
| 21 | 157629612076 |
| 22 | 502736717207 |
| 23 | 1597541346522 |
| 24 | 5059625685739 |
| 25 | 15975936032821 |
| 26 | 50304490599602 |
[9,64,326,1433,5799,22224,81987,293987,1031298, 3555085,12081775,40576240,134919788,444805274, 1455645411,4733022100,15302145060,49223709597, 157629612076,502736717207,1597541346522, 5059625685739,15975936032821,50304490599602] |