n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 4 |
4 | 10 |
5 | 26 |
6 | 72 |
7 | 206 |
8 | 606 |
9 | 1820 |
10 | 5558 |
11 | 17206 |
12 | 53872 |
13 | 170298 |
14 | 542778 |
15 | 1742308 |
16 | 5627698 |
17 | 18277698 |
18 | 59652952 |
19 | 195541494 |
20 | 643506310 |
21 | 2125255036 |
22 | 7041631854 |
23 | 23400092142 |
24 | 77971706848 |
25 | 260458050034 |
26 | 872040564850 |
27 | 2925902656644 |
28 | 9836517749658 |
29 | 33130048199466 |
[1,1,2,4,10,26,72,206,606,1820,5558,17206,53872, 170298,542778,1742308,5627698,18277698,59652952, 195541494,643506310,2125255036,7041631854, 23400092142,77971706848,260458050034,872040564850, 2925902656644,9836517749658,33130048199466] |