| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 8 |
| 3 | 16 |
| 4 | 80 |
| 5 | 160 |
| 6 | 640 |
| 7 | 2784 |
| 8 | 6560 |
| 9 | 21824 |
| 10 | 65280 |
| 11 | 131072 |
| 12 | 524800 |
| 13 | 1056192 |
| 14 | 4201728 |
| 15 | 8408000 |
| 16 | 43046720 |
| 17 | 86135424 |
| 18 | 361186816 |
| 19 | 1467183104 |
| 20 | 3443838080 |
| 21 | 11367226112 |
| 22 | 32550397696 |
| 23 | 70111011712 |
| 24 | 282403304960 |
| 25 | 569106797952 |
[1,2,8,16,80,160,640,2784,6560,21824,65280,131072, 524800,1056192,4201728,8408000,43046720,86135424, 361186816,1467183104,3443838080,11367226112, 32550397696,70111011712,282403304960,569106797952] |