n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 7 |
4 | 22 |
5 | 78 |
6 | 273 |
7 | 984 |
8 | 3573 |
9 | 13138 |
10 | 48670 |
11 | 181625 |
12 | 681630 |
13 | 2570979 |
14 | 9738171 |
15 | 37021873 |
16 | 141199583 |
17 | 540058408 |
18 | 2070814185 |
19 | 7958280782 |
20 | 30646175351 |
21 | 118230058466 |
22 | 456879024997 |
23 | 1768206394844 |
24 | 6852795439360 |
25 | 26592367534410 |
[1,1,2,7,22,78,273,984,3573,13138,48670,181625, 681630,2570979,9738171,37021873,141199583, 540058408,2070814185,7958280782,30646175351, 118230058466,456879024997,1768206394844, 6852795439360,26592367534410] |