n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 6 |
4 | 21 |
5 | 73 |
6 | 239 |
7 | 740 |
8 | 2194 |
9 | 6298 |
10 | 17653 |
11 | 48621 |
12 | 132199 |
13 | 356040 |
14 | 952154 |
15 | 2533014 |
16 | 6712221 |
17 | 17734489 |
18 | 46753127 |
19 | 123048884 |
20 | 323441770 |
21 | 849373210 |
22 | 2228871757 |
23 | 5845630221 |
24 | 15324795631 |
25 | 40162310568 |
26 | 105229244354 |
27 | 275659639590 |
28 | 722018109189 |
29 | 1890931558153 |
30 | 4951850306303 |
[1,1,2,6,21,73,239,740,2194,6298,17653,48621, 132199,356040,952154,2533014,6712221,17734489, 46753127,123048884,323441770,849373210,2228871757, 5845630221,15324795631,40162310568,105229244354, 275659639590,722018109189,1890931558153, 4951850306303] |