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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 18 |
| 3 | 2034 |
| 4 | 1430514 |
| 5 | 6373869750 |
| 6 | 199297681460658 |
| 7 | 46580417624524112586 |
| 8 | 84489819173818196151339522 |
| 9 | 1218062967741942570285262683718734 |
| 10 | 141844019201414810730077234469542638090002 |
| 11 | 134989625848267741768606388581746116482248689575890 |
| 12 | 1059352182865192441815498125890206907704205904500753040647218 |
[1,3,18,2034,1430514,6373869750,199297681460658, 46580417624524112586,84489819173818196151339522, 1218062967741942570285262683718734, 141844019201414810730077234469542638090002, 13498962584826774176860638858174611648224868957589\ 0, 10593521828651924418154981258902069077042059045007\ 53040647218] |