n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 6 |
4 | 22 |
5 | 87 |
6 | 354 |
7 | 1465 |
8 | 6154 |
9 | 26223 |
10 | 113236 |
11 | 494870 |
12 | 2185700 |
13 | 9743281 |
14 | 43784838 |
15 | 198156234 |
16 | 902374498 |
17 | 4131895035 |
18 | 19012201080 |
19 | 87864535600 |
20 | 407664831856 |
21 | 1898184887679 |
22 | 8867042353912 |
23 | 41543375724751 |
24 | 195164372948152 |
25 | 919138464708907 |
26 | 4338701289961694 |
27 | 20524046955770940 |
[1,1,2,6,22,87,354,1465,6154,26223,113236,494870, 2185700,9743281,43784838,198156234,902374498, 4131895035,19012201080,87864535600,407664831856, 1898184887679,8867042353912,41543375724751, 195164372948152,919138464708907,4338701289961694, 20524046955770940] |