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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 39 |
| 3 | 910 |
| 4 | 29949 |
| 5 | 1271751 |
| 6 | 66116065 |
| 7 | 4066082856 |
| 8 | 288701376912 |
| 9 | 23240635243591 |
| 10 | 2091554595246705 |
| 11 | 208085119389952134 |
| 12 | 22676957610808295192 |
| 13 | 2686515300821612112411 |
| 14 | 343760257348413122290260 |
| 15 | 47248346582443326267328400 |
| 16 | 6942339982115290619799947901 |
| 17 | 1085919469129099832397573088863 |
| 18 | 180160797497273341662653292624309 |
| 19 | 31598815412054398239059538582525618 |
[1,3,39,910,29949,1271751,66116065,4066082856, 288701376912,23240635243591,2091554595246705, 208085119389952134,22676957610808295192, 2686515300821612112411,343760257348413122290260, 47248346582443326267328400, 6942339982115290619799947901, 1085919469129099832397573088863, 180160797497273341662653292624309, 31598815412054398239059538582525618] |