n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 4 |
4 | 10 |
5 | 26 |
6 | 76 |
7 | 232 |
8 | 764 |
9 | 2620 |
10 | 9495 |
11 | 35685 |
12 | 140031 |
13 | 567503 |
14 | 2382394 |
15 | 10290308 |
16 | 45780063 |
17 | 208852719 |
18 | 977152266 |
19 | 4674398032 |
20 | 22854255698 |
21 | 113957313538 |
22 | 579157509082 |
23 | 2995214721530 |
24 | 15752586526189 |
25 | 84145056172981 |
26 | 456221504976506 |
27 | 2508227921637772 |
[1,1,2,4,10,26,76,232,764,2620,9495,35685,140031, 567503,2382394,10290308,45780063,208852719, 977152266,4674398032,22854255698,113957313538, 579157509082,2995214721530,15752586526189, 84145056172981,456221504976506,2508227921637772] |