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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 90 |
| 3 | 19953 |
| 4 | 43113141 |
| 5 | 847419543189 |
| 6 | 150097181430365019 |
| 7 | 239299779591639615799629 |
| 8 | 3433684538204027455551495578190 |
| 9 | 443426498544110770796791015548539667738 |
| 10 | 515377522062291104801900194512917291134738021506 |
[1,3,90,19953,43113141,847419543189, 150097181430365019,239299779591639615799629, 3433684538204027455551495578190, 443426498544110770796791015548539667738, 515377522062291104801900194512917291134738021506] |