n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 5 |
4 | 15 |
5 | 52 |
6 | 204 |
7 | 891 |
8 | 4266 |
9 | 22092 |
10 | 122358 |
11 | 718282 |
12 | 4438154 |
13 | 28711805 |
14 | 193700970 |
15 | 1358588449 |
16 | 9883071724 |
17 | 74423630202 |
18 | 579231718432 |
19 | 4652864427983 |
20 | 38528749877802 |
21 | 328519744186940 |
22 | 2881366257269722 |
23 | 25969840412367362 |
24 | 240307819488203558 |
25 | 2280902112035109237 |
26 | 22187847195528993904 |
27 | 221024332987155498348 |
[1,1,2,5,15,52,204,891,4266,22092,122358,718282, 4438154,28711805,193700970,1358588449,9883071724, 74423630202,579231718432,4652864427983, 38528749877802,328519744186940,2881366257269722, 25969840412367362,240307819488203558, 2280902112035109237,22187847195528993904, 221024332987155498348] |