n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 4 |
4 | 25 |
5 | 199 |
6 | 1855 |
7 | 19387 |
8 | 221407 |
9 | 2717782 |
10 | 35455981 |
11 | 487672243 |
12 | 7029980797 |
13 | 105732907498 |
14 | 1653377947393 |
15 | 26805765569863 |
16 | 449568735630517 |
17 | 7785116448484318 |
18 | 138980739891821269 |
19 | 2554369130466577138 |
[1,1,4,25,199,1855,19387,221407,2717782,35455981, 487672243,7029980797,105732907498,1653377947393, 26805765569863,449568735630517,7785116448484318, 138980739891821269,2554369130466577138] |