n | a(n) |
---|---|
1 | 1 |
2 | 9 |
3 | 56 |
4 | 336 |
5 | 2017 |
6 | 12105 |
7 | 72632 |
8 | 435792 |
9 | 2614753 |
10 | 15688521 |
11 | 94131128 |
12 | 564786768 |
13 | 3388720609 |
14 | 20332323657 |
15 | 121993941944 |
16 | 731963651664 |
17 | 4391781909985 |
18 | 26350691459913 |
19 | 158104148759480 |
20 | 948624892556880 |
21 | 5691749355341281 |
[1,9,56,336,2017,12105,72632,435792,2614753, 15688521,94131128,564786768,3388720609, 20332323657,121993941944,731963651664, 4391781909985,26350691459913,158104148759480, 948624892556880,5691749355341281] |