n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 5 |
3 | 13 |
4 | 34 |
5 | 136 |
6 | 666 |
7 | 3577 |
8 | 23353 |
9 | 200704 |
10 | 2062593 |
11 | 24878084 |
12 | 373006265 |
13 | 6917185552 |
14 | 153624835953 |
15 | 4155902941554 |
16 | 138450383756352 |
17 | 5602635336941568 |
18 | 274540864716936000 |
19 | 16486029239132118530 |
20 | 1209110712606533552257 |
[1,2,5,13,34,136,666,3577,23353,200704,2062593, 24878084,373006265,6917185552,153624835953, 4155902941554,138450383756352,5602635336941568, 274540864716936000,16486029239132118530, 1209110712606533552257] |