n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 6 |
3 | 37 |
4 | 235 |
5 | 1539 |
6 | 10392 |
7 | 72267 |
8 | 516474 |
9 | 3783115 |
10 | 28317562 |
11 | 215969271 |
12 | 1673702191 |
13 | 13148444197 |
14 | 104494340880 |
15 | 838670818365 |
16 | 6788255966595 |
17 | 55346471893395 |
18 | 454123503938490 |
19 | 3746885525588175 |
20 | 31066887028255065 |
[1,1,6,37,235,1539,10392,72267,516474,3783115, 28317562,215969271,1673702191,13148444197, 104494340880,838670818365,6788255966595, 55346471893395,454123503938490,3746885525588175, 31066887028255065] |