n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 5 |
4 | 20 |
5 | 84 |
6 | 354 |
7 | 1540 |
8 | 6704 |
9 | 29610 |
10 | 131745 |
11 | 591049 |
12 | 2669346 |
13 | 12131148 |
14 | 55431285 |
15 | 254539897 |
16 | 1174027598 |
17 | 5436826110 |
18 | 25269402555 |
19 | 117838870833 |
20 | 551192276450 |
21 | 2585418254532 |
22 | 12158383558066 |
23 | 57313008207960 |
[1,1,5,20,84,354,1540,6704,29610,131745,591049, 2669346,12131148,55431285,254539897,1174027598, 5436826110,25269402555,117838870833,551192276450, 2585418254532,12158383558066,57313008207960] |