n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 4 |
4 | 16 |
5 | 56 |
6 | 256 |
7 | 1072 |
8 | 6224 |
9 | 33616 |
10 | 218656 |
11 | 1326656 |
12 | 9893632 |
13 | 70186624 |
14 | 574017536 |
15 | 4454046976 |
16 | 40073925376 |
17 | 347165733632 |
18 | 3370414011904 |
19 | 31426411211776 |
20 | 328454079574016 |
21 | 3331595921852416 |
22 | 37125035407900672 |
23 | 400800185285464064 |
[1,1,2,4,16,56,256,1072,6224,33616,218656,1326656, 9893632,70186624,574017536,4454046976,40073925376, 347165733632,3370414011904,31426411211776, 328454079574016,3331595921852416, 37125035407900672,400800185285464064] |