n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 8 |
3 | 39 |
4 | 214 |
5 | 1274 |
6 | 8028 |
7 | 52698 |
8 | 356630 |
9 | 2470848 |
10 | 17440690 |
11 | 124981126 |
12 | 906887612 |
13 | 6650054278 |
14 | 49202240010 |
15 | 366856871768 |
16 | 2753772204894 |
17 | 20793368929970 |
18 | 157831516488476 |
19 | 1203618076715682 |
20 | 9217256564429454 |
21 | 70852472349915280 |
[1,2,8,39,214,1274,8028,52698,356630,2470848, 17440690,124981126,906887612,6650054278, 49202240010,366856871768,2753772204894, 20793368929970,157831516488476,1203618076715682, 9217256564429454,70852472349915280] |