n | a(n) |
---|---|
0 | 1 |
1 | 4 |
2 | 16 |
3 | 62 |
4 | 233 |
5 | 855 |
6 | 3083 |
7 | 10978 |
8 | 38746 |
9 | 135924 |
10 | 474955 |
11 | 1655789 |
12 | 5766389 |
13 | 20080608 |
14 | 69976772 |
15 | 244166410 |
16 | 853410637 |
17 | 2988825507 |
18 | 10490538559 |
19 | 36905911166 |
20 | 130139760590 |
21 | 459970519296 |
22 | 1629395348591 |
23 | 5784362027257 |
[1,4,16,62,233,855,3083,10978,38746,135924,474955, 1655789,5766389,20080608,69976772,244166410, 853410637,2988825507,10490538559,36905911166, 130139760590,459970519296,1629395348591, 5784362027257] |