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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 1 |
| 3 | 258 |
| 4 | 7589 |
| 5 | 114799 |
| 6 | 1351412 |
| 7 | 14220459 |
| 8 | 142084077 |
| 9 | 1389893708 |
| 10 | 13540170651 |
| 11 | 132693048551 |
| 12 | 1316256290186 |
| 13 | 13267436553245 |
| 14 | 136223753571349 |
| 15 | 1426933424886202 |
| 16 | 15263063171191857 |
| 17 | 166798075310353571 |
| 18 | 1862748034961296684 |
| 19 | 21259303294075547951 |
[0,1,258,7589,114799,1351412,14220459,142084077, 1389893708,13540170651,132693048551,1316256290186, 13267436553245,136223753571349,1426933424886202, 15263063171191857,166798075310353571, 1862748034961296684,21259303294075547951] |