n | a(n) |
---|---|
1 | 1 |
2 | 9 |
3 | 49 |
4 | 210 |
5 | 765 |
6 | 2492 |
7 | 7434 |
8 | 20700 |
9 | 54420 |
10 | 136360 |
11 | 327789 |
12 | 760102 |
13 | 1707342 |
14 | 3728025 |
15 | 7935525 |
16 | 16507152 |
17 | 33624045 |
18 | 67186077 |
19 | 131891825 |
20 | 254710260 |
21 | 484474753 |
22 | 908538081 |
23 | 1681364124 |
24 | 3073166600 |
25 | 5551851375 |
26 | 9919925145 |
27 | 17541289017 |
28 | 30714092066 |
29 | 53279031420 |
[1,9,49,210,765,2492,7434,20700,54420,136360, 327789,760102,1707342,3728025,7935525,16507152, 33624045,67186077,131891825,254710260,484474753, 908538081,1681364124,3073166600,5551851375, 9919925145,17541289017,30714092066,53279031420] |