n | a(n) |
---|---|
0 | 1 |
1 | 12 |
2 | 84 |
3 | 564 |
4 | 3804 |
5 | 25308 |
6 | 167796 |
7 | 1108452 |
8 | 7305132 |
9 | 48043044 |
10 | 315466884 |
11 | 2068604028 |
12 | 13549151244 |
13 | 88658702484 |
14 | 579649775796 |
15 | 3786953782764 |
[1,12,84,564,3804,25308,167796,1108452,7305132, 48043044,315466884,2068604028,13549151244, 88658702484,579649775796,3786953782764] |