n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 3 |
3 | 14 |
4 | 84 |
5 | 594 |
6 | 4719 |
7 | 40898 |
8 | 379236 |
9 | 3711916 |
10 | 37975756 |
11 | 403127256 |
12 | 4415203280 |
13 | 49671036900 |
14 | 571947380775 |
15 | 6721316278650 |
16 | 80419959684900 |
17 | 977737404590100 |
18 | 12058761323277900 |
19 | 150656212896017400 |
20 | 1904342169333848400 |
21 | 24328661192286773400 |
22 | 313839729380499376860 |
[1,1,3,14,84,594,4719,40898,379236,3711916, 37975756,403127256,4415203280,49671036900, 571947380775,6721316278650,80419959684900, 977737404590100,12058761323277900, 150656212896017400,1904342169333848400, 24328661192286773400,313839729380499376860] |