n | a(n) |
---|---|
0 | 1 |
1 | 9 |
2 | 72 |
3 | 566 |
4 | 4436 |
5 | 34748 |
6 | 272160 |
7 | 2131624 |
8 | 16695344 |
9 | 130761488 |
10 | 1024151680 |
11 | 8021372768 |
12 | 62825089344 |
13 | 492059397056 |
14 | 3853913344512 |
15 | 30184665012864 |
16 | 236412685103872 |
17 | 1851634187563264 |
18 | 14502390863865856 |
19 | 113585794743350784 |
[1,9,72,566,4436,34748,272160,2131624,16695344, 130761488,1024151680,8021372768,62825089344, 492059397056,3853913344512,30184665012864, 236412685103872,1851634187563264, 14502390863865856,113585794743350784] |