n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 6 |
4 | 15 |
5 | 35 |
6 | 84 |
7 | 204 |
8 | 493 |
9 | 1189 |
10 | 2870 |
11 | 6930 |
12 | 16731 |
13 | 40391 |
14 | 97512 |
15 | 235416 |
16 | 568345 |
17 | 1372105 |
18 | 3312554 |
19 | 7997214 |
20 | 19306983 |
21 | 46611179 |
22 | 112529340 |
23 | 271669860 |
24 | 655869061 |
25 | 1583407981 |
26 | 3822685022 |
27 | 9228778026 |
28 | 22280241075 |
29 | 53789260175 |
[1,1,2,6,15,35,84,204,493,1189,2870,6930,16731, 40391,97512,235416,568345,1372105,3312554,7997214, 19306983,46611179,112529340,271669860,655869061, 1583407981,3822685022,9228778026,22280241075, 53789260175] |