n | a(n) |
---|---|
1 | 1 |
2 | 15 |
3 | 126 |
4 | 700 |
5 | 2850 |
6 | 9261 |
7 | 25480 |
8 | 61776 |
9 | 135675 |
10 | 275275 |
11 | 523446 |
12 | 943020 |
13 | 1623076 |
14 | 2686425 |
15 | 4298400 |
16 | 6677056 |
17 | 10104885 |
18 | 14942151 |
19 | 21641950 |
20 | 30767100 |
21 | 43008966 |
22 | 59208325 |
23 | 80378376 |
24 | 107730000 |
25 | 142699375 |
26 | 186978051 |
27 | 242545590 |
[1,15,126,700,2850,9261,25480,61776,135675,275275, 523446,943020,1623076,2686425,4298400,6677056, 10104885,14942151,21641950,30767100,43008966, 59208325,80378376,107730000,142699375,186978051, 242545590] |