n | a(n) |
---|---|
1 | 2 |
2 | 5 |
3 | 15 |
4 | 109 |
5 | 574 |
6 | 2840 |
7 | 13767 |
8 | 71646 |
9 | 390862 |
10 | 2170370 |
11 | 11989812 |
12 | 66094738 |
13 | 366119221 |
14 | 2044786962 |
15 | 11503587136 |
16 | 65003352026 |
17 | 368281990242 |
18 | 2091514533360 |
19 | 11909843102866 |
20 | 68009104297282 |
21 | 389348569168108 |
22 | 2233795881384252 |
[2,5,15,109,574,2840,13767,71646,390862,2170370, 11989812,66094738,366119221,2044786962, 11503587136,65003352026,368281990242, 2091514533360,11909843102866,68009104297282, 389348569168108,2233795881384252] |