n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 3 |
3 | 9 |
4 | 33 |
5 | 141 |
6 | 651 |
7 | 3333 |
8 | 18369 |
9 | 108153 |
10 | 678771 |
11 | 4495041 |
12 | 31324833 |
13 | 228803589 |
14 | 1744475643 |
15 | 13852095741 |
16 | 114235118721 |
17 | 976176336753 |
18 | 8627940414819 |
19 | 78726234866553 |
20 | 740440277799201 |
21 | 7168107030092541 |
22 | 71331617341611243 |
23 | 728811735008913909 |
24 | 7637128289949856833 |
25 | 81995144342947130601 |
[1,1,3,9,33,141,651,3333,18369,108153,678771, 4495041,31324833,228803589,1744475643,13852095741, 114235118721,976176336753,8627940414819, 78726234866553,740440277799201,7168107030092541, 71331617341611243,728811735008913909, 7637128289949856833,81995144342947130601] |