n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 7 |
4 | 19 |
5 | 52 |
6 | 172 |
7 | 550 |
8 | 1782 |
9 | 5845 |
10 | 18508 |
11 | 56345 |
12 | 164157 |
13 | 454518 |
14 | 1196924 |
15 | 3003750 |
16 | 7198311 |
17 | 16523847 |
18 | 36447873 |
19 | 77478005 |
20 | 159172517 |
21 | 316874035 |
22 | 612729396 |
23 | 1153359711 |
24 | 2117566545 |
25 | 3798941401 |
26 | 6670327291 |
27 | 11479693332 |
28 | 19390588953 |
29 | 32185179449 |
30 | 52553840336 |
[1,1,2,7,19,52,172,550,1782,5845,18508,56345, 164157,454518,1196924,3003750,7198311,16523847, 36447873,77478005,159172517,316874035,612729396, 1153359711,2117566545,3798941401,6670327291, 11479693332,19390588953,32185179449,52553840336] |