n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 6 |
4 | 17 |
5 | 59 |
6 | 229 |
7 | 1029 |
8 | 5242 |
9 | 30040 |
10 | 191201 |
11 | 1338897 |
12 | 10228097 |
13 | 84647981 |
14 | 754437958 |
15 | 7204350870 |
16 | 73382899597 |
17 | 794189092567 |
18 | 9100736472725 |
19 | 110080467183393 |
20 | 1401588037032782 |
21 | 18737851806495008 |
22 | 262435512896178877 |
[1,1,2,6,17,59,229,1029,5242,30040,191201,1338897, 10228097,84647981,754437958,7204350870, 73382899597,794189092567,9100736472725, 110080467183393,1401588037032782, 18737851806495008,262435512896178877] |