n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 2 |
4 | 4 |
5 | 9 |
6 | 23 |
7 | 65 |
8 | 199 |
9 | 654 |
10 | 2296 |
11 | 8569 |
12 | 33825 |
13 | 140581 |
14 | 612933 |
15 | 2795182 |
16 | 13298464 |
17 | 65852872 |
18 | 338694406 |
19 | 1805809431 |
20 | 9963758843 |
21 | 56805378239 |
22 | 334156440067 |
23 | 2025424520548 |
24 | 12633195093794 |
25 | 80976535864874 |
26 | 532652296499548 |
[1,1,2,4,9,23,65,199,654,2296,8569,33825,140581, 612933,2795182,13298464,65852872,338694406, 1805809431,9963758843,56805378239,334156440067, 2025424520548,12633195093794,80976535864874, 532652296499548] |