n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 5 |
4 | 15 |
5 | 53 |
6 | 214 |
7 | 960 |
8 | 4701 |
9 | 24873 |
10 | 141147 |
11 | 853641 |
12 | 5472642 |
13 | 37024569 |
14 | 263342224 |
15 | 1962835806 |
16 | 15288074104 |
17 | 124120865849 |
18 | 1048092680689 |
19 | 9186689045482 |
20 | 83435365244510 |
21 | 783923558286071 |
22 | 7608398620990535 |
23 | 76177574145052258 |
24 | 785853360840424425 |
[1,1,2,5,15,53,214,960,4701,24873,141147,853641, 5472642,37024569,263342224,1962835806,15288074104, 124120865849,1048092680689,9186689045482, 83435365244510,783923558286071,7608398620990535, 76177574145052258,785853360840424425] |