n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 5 |
4 | 12 |
5 | 33 |
6 | 90 |
7 | 246 |
8 | 672 |
9 | 1836 |
10 | 5016 |
11 | 13704 |
12 | 37440 |
13 | 102288 |
14 | 279456 |
15 | 763488 |
16 | 2085888 |
17 | 5698752 |
18 | 15569280 |
19 | 42536064 |
20 | 116210688 |
21 | 317493504 |
22 | 867408384 |
23 | 2369803776 |
24 | 6474424320 |
25 | 17688456192 |
26 | 48325761024 |
27 | 132028434432 |
28 | 360708390912 |
[1,2,5,12,33,90,246,672,1836,5016,13704,37440, 102288,279456,763488,2085888,5698752,15569280, 42536064,116210688,317493504,867408384,2369803776, 6474424320,17688456192,48325761024,132028434432, 360708390912] |