n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 3 |
4 | 20 |
5 | 115 |
6 | 270 |
7 | 385 |
8 | 5240 |
9 | 5625 |
10 | 21730 |
11 | 300905 |
12 | 1290540 |
13 | 20688785 |
14 | 307710550 |
15 | 328399335 |
16 | 10177758160 |
17 | 178604677415 |
18 | 377564871150 |
19 | 10567221422735 |
20 | 43779145175540 |
21 | 1141273698563775 |
22 | 26071162562264930 |
[1,1,2,3,20,115,270,385,5240,5625,21730,300905, 1290540,20688785,307710550,328399335,10177758160, 178604677415,377564871150,10567221422735, 43779145175540,1141273698563775,26071162562264930] |