n | a(n) |
---|---|
1 | 1 |
2 | 3 |
3 | 21 |
4 | 209 |
5 | 2640 |
6 | 40391 |
7 | 726103 |
8 | 15003009 |
9 | 350382231 |
10 | 9127651499 |
11 | 262424759520 |
12 | 8254109243953 |
13 | 281944946167261 |
14 | 10393834843080975 |
15 | 411313439034311505 |
16 | 17391182043967249409 |
17 | 782469083251377707328 |
[1,3,21,209,2640,40391,726103,15003009,350382231, 9127651499,262424759520,8254109243953, 281944946167261,10393834843080975, 411313439034311505,17391182043967249409, 782469083251377707328] |