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 | 9823274 |
12 | 108056013 |
13 | 1404720092 |
14 | 18261352963 |
15 | 273907724376 |
16 | 4108601566641 |
17 | 69834315000567 |
18 | 1187167554049581 |
19 | 22546611220735671 |
20 | 428370636959431545 |
21 | 8988329939437212520 |
22 | 188741185272961560031 |
[1,1,1,3,9,45,225,1575,11025,99225,893025,9823274, 108056013,1404720092,18261352963,273907724376, 4108601566641,69834315000567,1187167554049581, 22546611220735671,428370636959431545, 8988329939437212520,188741185272961560031] |