n | a(n) |
---|---|
1 | 9 |
2 | 60 |
3 | 240 |
4 | 912 |
5 | 3312 |
6 | 11664 |
7 | 40176 |
8 | 136080 |
9 | 454896 |
10 | 1504656 |
11 | 4933872 |
12 | 16061328 |
13 | 51963120 |
14 | 167226768 |
15 | 535692528 |
16 | 1709114256 |
17 | 5433452784 |
18 | 17218688400 |
19 | 54411055344 |
20 | 171498136464 |
21 | 539289320688 |
22 | 1692252695952 |
23 | 5299912289520 |
[9,60,240,912,3312,11664,40176,136080,454896, 1504656,4933872,16061328,51963120,167226768, 535692528,1709114256,5433452784,17218688400, 54411055344,171498136464,539289320688, 1692252695952,5299912289520] |