| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 3 |
| 3 | 26 |
| 4 | 453 |
| 5 | 11844 |
| 6 | 439975 |
| 7 | 22056222 |
| 8 | 1436236809 |
| 9 | 117923229512 |
| 10 | 11921584264011 |
| 11 | 1455483251191650 |
| 12 | 211163237294447053 |
| 13 | 35913642489947449356 |
| 14 | 7077505637217289437423 |
| 15 | 1599980633296779087784934 |
| 16 | 411293643476907595937924625 |
| 17 | 119299057697083019137937718672 |
[1,0,3,26,453,11844,439975,22056222,1436236809, 117923229512,11921584264011,1455483251191650, 211163237294447053,35913642489947449356, 7077505637217289437423,1599980633296779087784934, 411293643476907595937924625, 119299057697083019137937718672] |