n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 6 |
4 | 24 |
5 | 120 |
6 | 504 |
7 | 1902 |
8 | 6902 |
9 | 25231 |
10 | 95401 |
11 | 365116 |
12 | 1396948 |
13 | 5316192 |
14 | 20135712 |
15 | 76227216 |
16 | 288878956 |
17 | 1095937420 |
18 | 4159450913 |
19 | 15783649241 |
20 | 59878012558 |
21 | 227128287882 |
22 | 861543171080 |
23 | 3268198646496 |
24 | 12398132725784 |
25 | 47033439463906 |
26 | 178423731589482 |
[1,1,2,6,24,120,504,1902,6902,25231,95401,365116, 1396948,5316192,20135712,76227216,288878956, 1095937420,4159450913,15783649241,59878012558, 227128287882,861543171080,3268198646496, 12398132725784,47033439463906,178423731589482] |