| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 0 |
| 6 | 1600 |
| 7 | 389312 |
| 8 | 22057472 |
| 9 | 565532992 |
| 10 | 8611750848 |
| 11 | 90564534336 |
| 12 | 720227187456 |
| 13 | 4603893554496 |
| 14 | 24675964279680 |
| 15 | 114402835995392 |
| 16 | 469601097840640 |
| 17 | 1737913582100864 |
| 18 | 5882030372643968 |
| 19 | 18417596366384512 |
| 20 | 53854324059153920 |
| 21 | 148209412582029184 |
| 22 | 386390343290393024 |
| 23 | 959556901097413696 |
[0,0,0,0,0,1600,389312,22057472,565532992, 8611750848,90564534336,720227187456,4603893554496, 24675964279680,114402835995392,469601097840640, 1737913582100864,5882030372643968, 18417596366384512,53854324059153920, 148209412582029184,386390343290393024, 959556901097413696] |