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 | 140580 |
14 | 612890 |
15 | 2794159 |
16 | 13280627 |
17 | 65597882 |
18 | 335521900 |
19 | 1770176005 |
20 | 9593485125 |
21 | 53183385680 |
22 | 300371056446 |
23 | 1721926382427 |
24 | 9987133305239 |
25 | 58446578859494 |
26 | 344361988828048 |
[1,1,2,4,9,23,65,199,654,2296,8569,33825,140580, 612890,2794159,13280627,65597882,335521900, 1770176005,9593485125,53183385680,300371056446, 1721926382427,9987133305239,58446578859494, 344361988828048] |