n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 5 |
3 | 33 |
4 | 252 |
5 | 2091 |
6 | 18319 |
7 | 166750 |
8 | 1561599 |
9 | 14948572 |
10 | 145615404 |
11 | 1438752770 |
12 | 14384289530 |
13 | 145248707646 |
14 | 1479212551278 |
15 | 15175516654760 |
16 | 156691764630780 |
17 | 1627069871618145 |
18 | 16980373299730925 |
19 | 178006989972532900 |
20 | 1873607777794186000 |
[1,1,5,33,252,2091,18319,166750,1561599,14948572, 145615404,1438752770,14384289530,145248707646, 1479212551278,15175516654760,156691764630780, 1627069871618145,16980373299730925, 178006989972532900,1873607777794186000] |