n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 4 |
3 | 8 |
4 | 18 |
5 | 48 |
6 | 144 |
7 | 448 |
8 | 1380 |
9 | 4152 |
10 | 12224 |
11 | 35456 |
12 | 102024 |
13 | 292768 |
14 | 840416 |
15 | 2416384 |
16 | 6959504 |
17 | 20069280 |
18 | 57913536 |
19 | 167158656 |
20 | 482462752 |
21 | 1392319488 |
22 | 4017460224 |
23 | 11590946816 |
24 | 33439639616 |
25 | 96470796672 |
26 | 278311599616 |
[1,2,4,8,18,48,144,448,1380,4152,12224,35456, 102024,292768,840416,2416384,6959504,20069280, 57913536,167158656,482462752,1392319488, 4017460224,11590946816,33439639616,96470796672, 278311599616] |