n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 6 |
3 | 18 |
4 | 57 |
5 | 186 |
6 | 622 |
7 | 2120 |
8 | 7338 |
9 | 25724 |
10 | 91144 |
11 | 325878 |
12 | 1174281 |
13 | 4260282 |
14 | 15548694 |
15 | 57048048 |
16 | 210295326 |
17 | 778483932 |
18 | 2892818244 |
19 | 10786724388 |
20 | 40347919626 |
21 | 151355847012 |
22 | 569274150156 |
23 | 2146336125648 |
24 | 8110508473252 |
[1,2,6,18,57,186,622,2120,7338,25724,91144,325878, 1174281,4260282,15548694,57048048,210295326, 778483932,2892818244,10786724388,40347919626, 151355847012,569274150156,2146336125648, 8110508473252] |