n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 4 |
3 | 12 |
4 | 24 |
5 | 80 |
6 | 292 |
7 | 966 |
8 | 3876 |
9 | 15554 |
10 | 61608 |
11 | 254612 |
12 | 1065676 |
13 | 4471672 |
14 | 19074968 |
15 | 82043172 |
16 | 354365492 |
17 | 1543432514 |
18 | 6760146292 |
19 | 29732837780 |
20 | 131440491584 |
21 | 583419967664 |
22 | 2598585783488 |
23 | 11615321544700 |
24 | 52079369904384 |
25 | 234157152231726 |
26 | 1055628140278948 |
27 | 4770576024205060 |
[1,2,4,12,24,80,292,966,3876,15554,61608,254612, 1065676,4471672,19074968,82043172,354365492, 1543432514,6760146292,29732837780,131440491584, 583419967664,2598585783488,11615321544700, 52079369904384,234157152231726,1055628140278948, 4770576024205060] |