n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 6 |
4 | 16 |
5 | 50 |
6 | 144 |
7 | 462 |
8 | 1392 |
9 | 4536 |
10 | 14060 |
11 | 46310 |
12 | 146376 |
13 | 485914 |
14 | 1557892 |
15 | 5202690 |
16 | 16861984 |
17 | 56579196 |
18 | 184940388 |
19 | 622945970 |
20 | 2050228360 |
21 | 6927964218 |
22 | 22930109884 |
23 | 77692142980 |
24 | 258360586368 |
25 | 877395996200 |
26 | 2929432171328 |
27 | 9968202968958 |
28 | 33396290888520 |
29 | 113837957337750 |
[1,2,6,16,50,144,462,1392,4536,14060,46310,146376, 485914,1557892,5202690,16861984,56579196, 184940388,622945970,2050228360,6927964218, 22930109884,77692142980,258360586368,877395996200, 2929432171328,9968202968958,33396290888520, 113837957337750] |