n | a(n) |
---|---|
3 | 1 |
4 | 8 |
5 | 44 |
6 | 208 |
7 | 910 |
8 | 3808 |
9 | 15504 |
10 | 62016 |
11 | 245157 |
12 | 961400 |
13 | 3749460 |
14 | 14567280 |
15 | 56448210 |
16 | 218349120 |
17 | 843621600 |
18 | 3257112960 |
19 | 12570420330 |
20 | 48507033744 |
21 | 187187399448 |
22 | 722477682080 |
23 | 2789279908316 |
24 | 10772391370048 |
25 | 41620603020640 |
[1,8,44,208,910,3808,15504,62016,245157,961400, 3749460,14567280,56448210,218349120,843621600, 3257112960,12570420330,48507033744,187187399448, 722477682080,2789279908316,10772391370048, 41620603020640] |