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| n | a(n) |
|---|---|
| 3 | 0 |
| 4 | 1 |
| 5 | 5 |
| 6 | 6 |
| 7 | 15 |
| 8 | 38 |
| 9 | 65 |
| 10 | 172 |
| 11 | 387 |
| 12 | 704 |
| 13 | 1762 |
| 14 | 3996 |
| 15 | 8251 |
| 16 | 19330 |
| 17 | 44516 |
| 18 | 100594 |
| 19 | 240394 |
| 20 | 577364 |
| 21 | 1414354 |
| 22 | 3574325 |
| 23 | 9134924 |
| 24 | 23764397 |
| 25 | 62676552 |
| 26 | 166338401 |
| 27 | 443927873 |
| 28 | 1187612840 |
| 29 | 3177120391 |
| 30 | 8493106642 |
[0,1,5,6,15,38,65,172,387,704,1762,3996,8251, 19330,44516,100594,240394,577364,1414354,3574325, 9134924,23764397,62676552,166338401,443927873, 1187612840,3177120391,8493106642] |