n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 4 |
3 | 19 |
4 | 112 |
5 | 811 |
6 | 7024 |
7 | 70939 |
8 | 818752 |
9 | 10630891 |
10 | 153371344 |
11 | 2433948859 |
12 | 42137351392 |
13 | 790287522571 |
14 | 15962014455664 |
15 | 345424786466779 |
16 | 7973482022972032 |
17 | 195556150543703851 |
18 | 5078301994885267984 |
[1,1,4,19,112,811,7024,70939,818752,10630891, 153371344,2433948859,42137351392,790287522571, 15962014455664,345424786466779,7973482022972032, 195556150543703851,5078301994885267984] |