n | a(n) |
---|---|
0 | 0 |
1 | 2 |
2 | 7 |
3 | 69 |
4 | 377 |
5 | 2794 |
6 | 17499 |
7 | 119930 |
8 | 782560 |
9 | 5243499 |
10 | 34631867 |
11 | 230522137 |
12 | 1527974718 |
13 | 10151087309 |
14 | 67355177296 |
15 | 447219602022 |
16 | 2968334148479 |
17 | 19705628071261 |
18 | 130804123379301 |
19 | 868315777996646 |
20 | 5763951923164423 |
21 | 38262238564792074 |
22 | 253989877628319020 |
[0,2,7,69,377,2794,17499,119930,782560,5243499, 34631867,230522137,1527974718,10151087309, 67355177296,447219602022,2968334148479, 19705628071261,130804123379301,868315777996646, 5763951923164423,38262238564792074, 253989877628319020] |