n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 6 |
4 | 24 |
5 | 78 |
6 | 230 |
7 | 506 |
8 | 1128 |
9 | 2641 |
10 | 6655 |
11 | 17261 |
12 | 46066 |
13 | 119052 |
14 | 300864 |
15 | 750728 |
16 | 1876024 |
17 | 4711588 |
18 | 11951068 |
19 | 30392680 |
20 | 77225565 |
21 | 195701321 |
22 | 494881594 |
23 | 1249924470 |
24 | 3159185418 |
25 | 7992133318 |
26 | 20232067074 |
27 | 51226594151 |
28 | 129680774266 |
[1,2,6,24,78,230,506,1128,2641,6655,17261,46066, 119052,300864,750728,1876024,4711588,11951068, 30392680,77225565,195701321,494881594,1249924470, 3159185418,7992133318,20232067074,51226594151, 129680774266] |