n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 2 |
4 | 7 |
5 | 23 |
6 | 112 |
7 | 607 |
8 | 3811 |
9 | 25413 |
10 | 178083 |
11 | 1279537 |
12 | 9371094 |
13 | 69513546 |
14 | 520878101 |
15 | 3934285874 |
16 | 29915913663 |
17 | 228779330204 |
18 | 1758309223457 |
19 | 13573319825615 |
20 | 105192814197984 |
21 | 818136047201932 |
22 | 6383528588447574 |
[1,1,2,7,23,112,607,3811,25413,178083,1279537, 9371094,69513546,520878101,3934285874,29915913663, 228779330204,1758309223457,13573319825615, 105192814197984,818136047201932,6383528588447574] |