n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 6 |
4 | 16 |
5 | 47 |
6 | 146 |
7 | 471 |
8 | 1562 |
9 | 5291 |
10 | 18226 |
11 | 63648 |
12 | 224808 |
13 | 801686 |
14 | 2882452 |
15 | 10437745 |
16 | 38032110 |
17 | 139339635 |
18 | 512996370 |
19 | 1896907980 |
20 | 7041759120 |
21 | 26233530210 |
22 | 98046684060 |
23 | 367525880670 |
24 | 1381386710964 |
25 | 5205006015102 |
[1,1,2,6,16,47,146,471,1562,5291,18226,63648, 224808,801686,2882452,10437745,38032110,139339635, 512996370,1896907980,7041759120,26233530210, 98046684060,367525880670,1381386710964, 5205006015102] |