n | a(n) |
---|---|
0 | 1 |
1 | 3 |
2 | 14 |
3 | 84 |
4 | 600 |
5 | 4908 |
6 | 44952 |
7 | 454344 |
8 | 5016768 |
9 | 60062352 |
10 | 775089312 |
11 | 10728930912 |
12 | 158638465536 |
13 | 2496437377728 |
14 | 41674737264000 |
15 | 735831528563328 |
16 | 13704461848753152 |
17 | 268562085051533568 |
18 | 5525005742876244480 |
[1,3,14,84,600,4908,44952,454344,5016768,60062352, 775089312,10728930912,158638465536,2496437377728, 41674737264000,735831528563328,13704461848753152, 268562085051533568,5525005742876244480] |