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| n | a(n) |
|---|---|
| 3 | 1 |
| 4 | 71 |
| 5 | 491 |
| 6 | 2522 |
| 7 | 9263 |
| 8 | 27723 |
| 9 | 71480 |
| 10 | 163908 |
| 11 | 345657 |
| 12 | 679802 |
| 13 | 1252185 |
| 14 | 2203724 |
| 15 | 3715206 |
| 16 | 6041979 |
| 17 | 9510283 |
| 18 | 14591324 |
| 19 | 21788606 |
| 20 | 31894205 |
| 21 | 45741815 |
| 22 | 64467383 |
| 23 | 89363919 |
| 24 | 122254946 |
| 25 | 164721244 |
| 26 | 219526449 |
| 27 | 289133792 |
| 28 | 377013829 |
| 29 | 486522424 |
| 30 | 622759365 |
[1,71,491,2522,9263,27723,71480,163908,345657, 679802,1252185,2203724,3715206,6041979,9510283, 14591324,21788606,31894205,45741815,64467383, 89363919,122254946,164721244,219526449,289133792, 377013829,486522424,622759365] |