n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 1 |
4 | 1 |
5 | 3 |
6 | 13 |
7 | 43 |
8 | 113 |
9 | 273 |
10 | 725 |
11 | 2245 |
12 | 7305 |
13 | 22875 |
14 | 68545 |
15 | 204247 |
16 | 626177 |
17 | 1977377 |
18 | 6301577 |
19 | 19965657 |
20 | 62913409 |
21 | 198797059 |
22 | 633412869 |
23 | 2032810979 |
24 | 6543426769 |
25 | 21071181585 |
26 | 67905492605 |
27 | 219347606365 |
28 | 710732629705 |
[1,1,1,1,3,13,43,113,273,725,2245,7305,22875, 68545,204247,626177,1977377,6301577,19965657, 62913409,198797059,633412869,2032810979, 6543426769,21071181585,67905492605,219347606365, 710732629705] |