n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 5 |
4 | 12 |
5 | 33 |
6 | 92 |
7 | 267 |
8 | 792 |
9 | 2403 |
10 | 7414 |
11 | 23199 |
12 | 73454 |
13 | 234901 |
14 | 757654 |
15 | 2461877 |
16 | 8051284 |
17 | 26480681 |
18 | 87534184 |
19 | 290652931 |
20 | 968992200 |
21 | 3242229475 |
22 | 10884245838 |
23 | 36648566551 |
24 | 123739675390 |
25 | 418848744517 |
26 | 1421072269234 |
27 | 4831811596381 |
[1,1,2,5,12,33,92,267,792,2403,7414,23199,73454, 234901,757654,2461877,8051284,26480681,87534184, 290652931,968992200,3242229475,10884245838, 36648566551,123739675390,418848744517, 1421072269234,4831811596381] |