n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 3 |
4 | 9 |
5 | 45 |
6 | 225 |
7 | 1575 |
8 | 11025 |
9 | 99225 |
10 | 893025 |
11 | 9823275 |
12 | 108056024 |
13 | 1404728312 |
14 | 18261451790 |
15 | 273921776850 |
16 | 4108787293579 |
17 | 69849383990843 |
18 | 1187387325581683 |
19 | 22560359186051977 |
20 | 428591632052426778 |
21 | 9000424273100962338 |
22 | 188954690005716285164 |
[1,1,1,3,9,45,225,1575,11025,99225,893025,9823275, 108056024,1404728312,18261451790,273921776850, 4108787293579,69849383990843,1187387325581683, 22560359186051977,428591632052426778, 9000424273100962338,188954690005716285164] |