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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 9 |
| 3 | 193 |
| 4 | 6721 |
| 5 | 326001 |
| 6 | 20316937 |
| 7 | 1548374129 |
| 8 | 139576777921 |
| 9 | 14530808439073 |
| 10 | 1715928199384521 |
| 11 | 226652340142349793 |
| 12 | 33113449456084235905 |
| 13 | 5302086923264289694225 |
| 14 | 923349950199153833740105 |
| 15 | 173761214485224395469845521 |
| 16 | 35139709415689684107278235265 |
[1,1,9,193,6721,326001,20316937,1548374129, 139576777921,14530808439073,1715928199384521, 226652340142349793,33113449456084235905, 5302086923264289694225,923349950199153833740105, 173761214485224395469845521, 35139709415689684107278235265] |