n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 2 |
4 | 10 |
5 | 32 |
6 | 126 |
7 | 452 |
8 | 1716 |
9 | 6400 |
10 | 24310 |
11 | 92252 |
12 | 352716 |
13 | 1351616 |
14 | 5200300 |
15 | 20056584 |
16 | 77558760 |
17 | 300533760 |
18 | 1166803110 |
19 | 4537543340 |
20 | 17672631900 |
21 | 68923172032 |
22 | 269128937220 |
23 | 1052049129144 |
24 | 4116715363800 |
[1,1,2,10,32,126,452,1716,6400,24310,92252,352716, 1351616,5200300,20056584,77558760,300533760, 1166803110,4537543340,17672631900,68923172032, 269128937220,1052049129144,4116715363800] |