n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 5 |
4 | 15 |
5 | 52 |
6 | 203 |
7 | 877 |
8 | 4140 |
9 | 21147 |
10 | 115975 |
11 | 678570 |
12 | 4213597 |
13 | 27644437 |
14 | 190899321 |
15 | 1382958439 |
16 | 10480136006 |
17 | 82864611947 |
18 | 682068020031 |
19 | 5832484170844 |
20 | 51717380273487 |
21 | 474706578749477 |
22 | 4503047451718545 |
23 | 44074082550176545 |
[1,2,5,15,52,203,877,4140,21147,115975,678570, 4213597,27644437,190899321,1382958439,10480136006, 82864611947,682068020031,5832484170844, 51717380273487,474706578749477,4503047451718545, 44074082550176545] |