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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 14 |
| 3 | 64 |
| 4 | 528 |
| 5 | 1696 |
| 6 | 11616 |
| 7 | 33600 |
| 8 | 169072 |
| 9 | 525760 |
| 10 | 2069922 |
| 11 | 5928066 |
| 12 | 22259874 |
| 13 | 59321760 |
| 14 | 193797792 |
| 15 | 526647420 |
| 16 | 1566376990 |
| 17 | 4012181104 |
| 18 | 11456306798 |
| 19 | 28263784110 |
| 20 | 75995086336 |
| 21 | 184440427360 |
| 22 | 468750673616 |
| 23 | 1104027571108 |
| 24 | 2730165482640 |
| 25 | 6239956155696 |
[1,0,14,64,528,1696,11616,33600,169072,525760, 2069922,5928066,22259874,59321760,193797792, 526647420,1566376990,4012181104,11456306798, 28263784110,75995086336,184440427360,468750673616, 1104027571108,2730165482640,6239956155696] |