n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 5 |
4 | 14 |
5 | 42 |
6 | 132 |
7 | 431 |
8 | 1452 |
9 | 5026 |
10 | 17808 |
11 | 64398 |
12 | 237097 |
13 | 886935 |
14 | 3365348 |
15 | 12933691 |
16 | 50285912 |
17 | 197586405 |
18 | 783922944 |
19 | 3138088910 |
20 | 12666148475 |
21 | 51517864816 |
22 | 211047556685 |
23 | 870385025022 |
24 | 3612193740355 |
25 | 15079839929453 |
26 | 63305470339527 |
27 | 267159465034792 |
[1,1,2,5,14,42,132,431,1452,5026,17808,64398, 237097,886935,3365348,12933691,50285912,197586405, 783922944,3138088910,12666148475,51517864816, 211047556685,870385025022,3612193740355, 15079839929453,63305470339527,267159465034792] |