n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 7 |
4 | 22 |
5 | 75 |
6 | 250 |
7 | 886 |
8 | 3150 |
9 | 11525 |
10 | 42698 |
11 | 160636 |
12 | 610694 |
13 | 2345584 |
14 | 9081850 |
15 | 35422281 |
16 | 139022744 |
17 | 548671671 |
18 | 2176051206 |
19 | 8668363781 |
20 | 34667284600 |
21 | 139140831224 |
22 | 560271494924 |
23 | 2262709876353 |
24 | 9163000968906 |
25 | 37198940600718 |
26 | 151364381619042 |
[1,2,7,22,75,250,886,3150,11525,42698,160636, 610694,2345584,9081850,35422281,139022744, 548671671,2176051206,8668363781,34667284600, 139140831224,560271494924,2262709876353, 9163000968906,37198940600718,151364381619042] |