n | a(n) |
---|---|
0 | 1 |
1 | 5 |
2 | 15 |
3 | 55 |
4 | 190 |
5 | 671 |
6 | 2353 |
7 | 8272 |
8 | 29056 |
9 | 102091 |
10 | 358671 |
11 | 1260143 |
12 | 4427294 |
13 | 15554592 |
14 | 54648506 |
15 | 191998646 |
16 | 674555937 |
17 | 2369942427 |
18 | 8326406594 |
19 | 29253473175 |
20 | 102777312308 |
21 | 361091343583 |
22 | 1268635610806 |
23 | 4457144547354 |
[1,5,15,55,190,671,2353,8272,29056,102091,358671, 1260143,4427294,15554592,54648506,191998646, 674555937,2369942427,8326406594,29253473175, 102777312308,361091343583,1268635610806, 4457144547354] |