n | a(n) |
---|---|
1 | 2 |
2 | 12 |
3 | 50 |
4 | 192 |
5 | 722 |
6 | 2700 |
7 | 10082 |
8 | 37632 |
9 | 140450 |
10 | 524172 |
11 | 1956242 |
12 | 7300800 |
13 | 27246962 |
14 | 101687052 |
15 | 379501250 |
16 | 1416317952 |
17 | 5285770562 |
18 | 19726764300 |
19 | 73621286642 |
20 | 274758382272 |
21 | 1025412242450 |
22 | 3826890587532 |
23 | 14282150107682 |
24 | 53301709843200 |
25 | 198924689265122 |
26 | 742397047217292 |
[2,12,50,192,722,2700,10082,37632,140450,524172, 1956242,7300800,27246962,101687052,379501250, 1416317952,5285770562,19726764300,73621286642, 274758382272,1025412242450,3826890587532, 14282150107682,53301709843200,198924689265122, 742397047217292] |