n | a(n) |
---|---|
1 | 1 |
2 | 5 |
3 | 20 |
4 | 96 |
5 | 469 |
6 | 3145 |
7 | 20684 |
8 | 173544 |
9 | 1557105 |
10 | 16215253 |
11 | 159346604 |
12 | 2230085528 |
13 | 26985045333 |
14 | 368730610729 |
15 | 5628888393652 |
16 | 97987283458928 |
17 | 1475486672174337 |
18 | 29097611462122437 |
19 | 505383110562327268 |
20 | 10970329921706735216 |
[1,5,20,96,469,3145,20684,173544,1557105,16215253, 159346604,2230085528,26985045333,368730610729, 5628888393652,97987283458928,1475486672174337, 29097611462122437,505383110562327268, 10970329921706735216] |