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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 14 |
| 3 | 351 |
| 4 | 9100 |
| 5 | 236237 |
| 6 | 6133050 |
| 7 | 159223051 |
| 8 | 4133666264 |
| 9 | 107316099801 |
| 10 | 2786084928550 |
| 11 | 72330892042487 |
| 12 | 1877817108176100 |
| 13 | 48750913920536101 |
| 14 | 1265645944825762514 |
| 15 | 32858043651549289251 |
| 16 | 853043488995455758000 |
| 17 | 22146272670230300418737 |
| 18 | 574950045936992355129150 |
[1,14,351,9100,236237,6133050,159223051, 4133666264,107316099801,2786084928550, 72330892042487,1877817108176100,48750913920536101, 1265645944825762514,32858043651549289251, 853043488995455758000,22146272670230300418737, 574950045936992355129150] |