n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 5 |
4 | 20 |
5 | 87 |
6 | 522 |
7 | 3271 |
8 | 26168 |
9 | 214955 |
10 | 2149550 |
11 | 21881103 |
12 | 262573236 |
13 | 3191361201 |
14 | 44679056814 |
15 | 631546127049 |
16 | 10104738032784 |
17 | 162891774138339 |
18 | 2932051934490102 |
19 | 53094870211027831 |
20 | 1061897404220556620 |
21 | 21342730463672017301 |
22 | 469540070200784380622 |
[1,1,2,5,20,87,522,3271,26168,214955,2149550, 21881103,262573236,3191361201,44679056814, 631546127049,10104738032784,162891774138339, 2932051934490102,53094870211027831, 1061897404220556620,21342730463672017301, 469540070200784380622] |