n | a(n) |
---|---|
0 | 1 |
1 | 28 |
2 | 405 |
3 | 4032 |
4 | 31058 |
5 | 197288 |
6 | 1075697 |
7 | 5174180 |
8 | 22396787 |
9 | 88562288 |
10 | 323686749 |
11 | 1103799420 |
12 | 3538931886 |
13 | 10735761372 |
14 | 30981056614 |
15 | 85436083852 |
16 | 226032307036 |
17 | 575653531156 |
18 | 1415485760287 |
19 | 3369314791024 |
20 | 7781762472652 |
21 | 17474847498496 |
[1,28,405,4032,31058,197288,1075697,5174180, 22396787,88562288,323686749,1103799420,3538931886, 10735761372,30981056614,85436083852,226032307036, 575653531156,1415485760287,3369314791024, 7781762472652,17474847498496] |