n | a(n) |
---|---|
0 | 1 |
1 | 3 |
2 | 10 |
3 | 36 |
4 | 138 |
5 | 558 |
6 | 2364 |
7 | 10440 |
8 | 47868 |
9 | 227124 |
10 | 1112184 |
11 | 5607792 |
12 | 29057400 |
13 | 154465704 |
14 | 841143312 |
15 | 4685949792 |
16 | 26674999056 |
17 | 155000193840 |
18 | 918475565472 |
19 | 5545430185536 |
20 | 34087326300576 |
21 | 213170582612448 |
22 | 1355345600149440 |
23 | 8755789617922176 |
24 | 57440317657203648 |
[1,3,10,36,138,558,2364,10440,47868,227124, 1112184,5607792,29057400,154465704,841143312, 4685949792,26674999056,155000193840,918475565472, 5545430185536,34087326300576,213170582612448, 1355345600149440,8755789617922176, 57440317657203648] |