n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 3 |
3 | 6 |
4 | 16 |
5 | 37 |
6 | 105 |
7 | 250 |
8 | 726 |
9 | 1824 |
10 | 5148 |
11 | 13406 |
12 | 37150 |
13 | 99246 |
14 | 271533 |
15 | 739222 |
16 | 2003686 |
17 | 5534352 |
18 | 14894898 |
19 | 41614480 |
20 | 112569696 |
21 | 329633400 |
22 | 939351720 |
23 | 2713971172 |
24 | 7790778688 |
25 | 22262413872 |
26 | 64295778000 |
27 | 182043931368 |
28 | 528451813656 |
29 | 1484599951100 |
30 | 4328456538812 |
[1,1,3,6,16,37,105,250,726,1824,5148,13406,37150, 99246,271533,739222,2003686,5534352,14894898, 41614480,112569696,329633400,939351720,2713971172, 7790778688,22262413872,64295778000,182043931368, 528451813656,1484599951100,4328456538812] |