n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 3 |
3 | 10 |
4 | 50 |
5 | 261 |
6 | 1877 |
7 | 13511 |
8 | 122663 |
9 | 1150988 |
10 | 12656562 |
11 | 142842855 |
12 | 1882666887 |
13 | 24961232401 |
14 | 375233443223 |
15 | 5784328028680 |
16 | 98433762560780 |
17 | 1704971188321787 |
18 | 32593405802749763 |
19 | 629093184347294419 |
20 | 13243913786996162915 |
21 | 283647771230983625422 |
[1,1,3,10,50,261,1877,13511,122663,1150988, 12656562,142842855,1882666887,24961232401, 375233443223,5784328028680,98433762560780, 1704971188321787,32593405802749763, 629093184347294419,13243913786996162915, 283647771230983625422] |