n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 6 |
3 | 35 |
4 | 204 |
5 | 1189 |
6 | 6930 |
7 | 40391 |
8 | 235416 |
9 | 1372105 |
10 | 7997214 |
11 | 46611179 |
12 | 271669860 |
13 | 1583407981 |
14 | 9228778026 |
15 | 53789260175 |
16 | 313506783024 |
17 | 1827251437969 |
18 | 10650001844790 |
19 | 62072759630771 |
20 | 361786555939836 |
21 | 2108646576008245 |
22 | 12290092900109634 |
23 | 71631910824649559 |
24 | 417501372047787720 |
[0,1,6,35,204,1189,6930,40391,235416,1372105, 7997214,46611179,271669860,1583407981,9228778026, 53789260175,313506783024,1827251437969, 10650001844790,62072759630771,361786555939836, 2108646576008245,12290092900109634, 71631910824649559,417501372047787720] |