n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 6 |
3 | 21 |
4 | 70 |
5 | 210 |
6 | 646 |
7 | 1881 |
8 | 5446 |
9 | 15295 |
10 | 42355 |
11 | 115036 |
12 | 308312 |
13 | 814023 |
14 | 2123431 |
15 | 5471967 |
16 | 13949888 |
17 | 35194914 |
18 | 87952796 |
19 | 217803302 |
20 | 534794576 |
21 | 1302545064 |
22 | 3148316746 |
23 | 7554386885 |
24 | 18001627175 |
25 | 42613759083 |
26 | 100240372671 |
27 | 234371794954 |
28 | 544812235887 |
[1,1,6,21,70,210,646,1881,5446,15295,42355,115036, 308312,814023,2123431,5471967,13949888,35194914, 87952796,217803302,534794576,1302545064, 3148316746,7554386885,18001627175,42613759083, 100240372671,234371794954,544812235887] |