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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 9 |
| 3 | 145 |
| 4 | 7169 |
| 5 | 702721 |
| 6 | 173051905 |
| 7 | 86399717377 |
| 8 | 99140462706689 |
| 9 | 233906591488868353 |
| 10 | 1206701231035902853121 |
| 11 | 12911553576265127971258369 |
| 12 | 292981931017250265780757463041 |
| 13 | 13856406784814016950200694583853057 |
| 14 | 1362697700959059311763086710096185524225 |
[1,1,9,145,7169,702721,173051905,86399717377, 99140462706689,233906591488868353, 1206701231035902853121,12911553576265127971258369, 292981931017250265780757463041, 13856406784814016950200694583853057, 1362697700959059311763086710096185524225] |