n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 3 |
3 | 8 |
4 | 23 |
5 | 67 |
6 | 202 |
7 | 622 |
8 | 1955 |
9 | 6248 |
10 | 20261 |
11 | 66484 |
12 | 220429 |
13 | 737260 |
14 | 2484734 |
15 | 8429714 |
16 | 28766001 |
17 | 98670291 |
18 | 340011308 |
19 | 1176505537 |
20 | 4086143638 |
21 | 14239716570 |
22 | 49776772808 |
23 | 174492148048 |
24 | 613266137776 |
25 | 2160518118345 |
26 | 7628244051977 |
27 | 26988540797766 |
28 | 95666557041459 |
[1,1,3,8,23,67,202,622,1955,6248,20261,66484, 220429,737260,2484734,8429714,28766001,98670291, 340011308,1176505537,4086143638,14239716570, 49776772808,174492148048,613266137776, 2160518118345,7628244051977,26988540797766, 95666557041459] |