n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 1 |
4 | 3 |
5 | 5 |
6 | 10 |
7 | 35 |
8 | 70 |
9 | 216 |
10 | 567 |
11 | 2310 |
12 | 5775 |
13 | 21450 |
14 | 69498 |
15 | 243243 |
16 | 1153152 |
17 | 3620864 |
18 | 16336320 |
19 | 64664600 |
20 | 249420600 |
21 | 997682400 |
22 | 5462865408 |
23 | 21422145536 |
[1,1,1,3,5,10,35,70,216,567,2310,5775,21450,69498, 243243,1153152,3620864,16336320,64664600, 249420600,997682400,5462865408,21422145536] |