n | a(n) |
---|---|
1 | 1 |
2 | 5 |
3 | 18 |
4 | 69 |
5 | 252 |
6 | 920 |
7 | 3370 |
8 | 12346 |
9 | 45207 |
10 | 165821 |
11 | 609734 |
12 | 2247151 |
13 | 8300708 |
14 | 30734578 |
15 | 114067100 |
16 | 424306230 |
17 | 1581788460 |
18 | 5909243454 |
19 | 22120325320 |
20 | 82963636468 |
21 | 311732564498 |
22 | 1173377033602 |
23 | 4424032482238 |
24 | 16706682557212 |
[1,5,18,69,252,920,3370,12346,45207,165821,609734, 2247151,8300708,30734578,114067100,424306230, 1581788460,5909243454,22120325320,82963636468, 311732564498,1173377033602,4424032482238, 16706682557212] |