n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 6 |
4 | 22 |
5 | 84 |
6 | 320 |
7 | 1212 |
8 | 4576 |
9 | 17256 |
10 | 65048 |
11 | 245184 |
12 | 924160 |
13 | 3483408 |
14 | 13129952 |
15 | 49490592 |
16 | 186544480 |
17 | 703140672 |
18 | 2650342784 |
19 | 9989916864 |
20 | 37654917376 |
21 | 141932392320 |
22 | 534984681344 |
23 | 2016513669120 |
24 | 7600829555200 |
25 | 28649748728064 |
26 | 107989278831104 |
27 | 407043163037184 |
[1,2,6,22,84,320,1212,4576,17256,65048,245184, 924160,3483408,13129952,49490592,186544480, 703140672,2650342784,9989916864,37654917376, 141932392320,534984681344,2016513669120, 7600829555200,28649748728064,107989278831104, 407043163037184] |