n | a(n) |
---|---|
2 | 9 |
3 | 1064 |
4 | 21656 |
5 | 197484 |
6 | 1143366 |
7 | 4927524 |
8 | 17240292 |
9 | 51631617 |
10 | 137044523 |
11 | 330284988 |
12 | 735542444 |
13 | 1533609350 |
14 | 3024043008 |
15 | 5684167992 |
16 | 10249533240 |
17 | 17821214019 |
18 | 30006185613 |
19 | 49097892704 |
20 | 78305096016 |
[9,1064,21656,197484,1143366,4927524,17240292, 51631617,137044523,330284988,735542444,1533609350, 3024043008,5684167992,10249533240,17821214019, 30006185613,49097892704,78305096016] |