n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 4 |
4 | 10 |
5 | 20 |
6 | 48 |
7 | 106 |
8 | 252 |
9 | 578 |
10 | 1372 |
11 | 3208 |
12 | 7584 |
13 | 17850 |
14 | 42102 |
15 | 99276 |
16 | 233716 |
17 | 550960 |
18 | 1295146 |
19 | 3050226 |
20 | 7161346 |
21 | 16846668 |
22 | 39511876 |
23 | 92845830 |
[1,2,4,10,20,48,106,252,578,1372,3208,7584,17850, 42102,99276,233716,550960,1295146,3050226,7161346, 16846668,39511876,92845830] |