| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 32 |
| 2 | 480 |
| 3 | 4480 |
| 4 | 29152 |
| 5 | 140736 |
| 6 | 525952 |
| 7 | 1580800 |
| 8 | 3994080 |
| 9 | 8945824 |
| 10 | 18626112 |
| 11 | 36714624 |
| 12 | 67978880 |
| 13 | 118156480 |
| 14 | 197120256 |
| 15 | 321692928 |
| 16 | 509145568 |
| 17 | 772845120 |
| 18 | 1143441760 |
| 19 | 1681379200 |
| 20 | 2428524096 |
| 21 | 3392205824 |
| 22 | 4658843520 |
| 23 | 6411152640 |
[1,32,480,4480,29152,140736,525952,1580800, 3994080,8945824,18626112,36714624,67978880, 118156480,197120256,321692928,509145568,772845120, 1143441760,1681379200,2428524096,3392205824, 4658843520,6411152640] |