n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 2 |
4 | 4 |
5 | 9 |
6 | 19 |
7 | 45 |
8 | 105 |
9 | 252 |
10 | 600 |
11 | 1435 |
12 | 3406 |
13 | 8076 |
14 | 19035 |
15 | 44749 |
16 | 104770 |
17 | 244642 |
18 | 569453 |
19 | 1322358 |
20 | 3062909 |
21 | 7079188 |
22 | 16326409 |
23 | 37579189 |
24 | 86331055 |
25 | 197972483 |
26 | 453188709 |
27 | 1035680593 |
28 | 2363000226 |
29 | 5382924016 |
30 | 12243518476 |
[1,1,1,2,4,9,19,45,105,252,600,1435,3406,8076, 19035,44749,104770,244642,569453,1322358,3062909, 7079188,16326409,37579189,86331055,197972483, 453188709,1035680593,2363000226,5382924016, 12243518476] |