n | a(n) |
---|---|
0 | 1 |
1 | 22 |
2 | 275 |
3 | 2530 |
4 | 18975 |
5 | 122430 |
6 | 702328 |
7 | 3661900 |
8 | 17627775 |
9 | 79264900 |
10 | 335937954 |
11 | 1351507830 |
12 | 5191041625 |
13 | 19125838600 |
14 | 67862904725 |
15 | 232671319474 |
16 | 773027485065 |
17 | 2494957906100 |
18 | 7839428942950 |
19 | 24025993453000 |
20 | 71941861591215 |
[1,22,275,2530,18975,122430,702328,3661900, 17627775,79264900,335937954,1351507830,5191041625, 19125838600,67862904725,232671319474,773027485065, 2494957906100,7839428942950,24025993453000, 71941861591215] |