n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 5 |
4 | 15 |
5 | 81 |
6 | 237 |
7 | 1015 |
8 | 3891 |
9 | 16171 |
10 | 66237 |
11 | 297003 |
12 | 1304467 |
13 | 5981617 |
14 | 27407859 |
15 | 126441771 |
16 | 584452845 |
17 | 2721978059 |
18 | 12719931479 |
19 | 59862174023 |
20 | 282898499059 |
21 | 1341705275365 |
22 | 6380905008633 |
23 | 30422523202843 |
24 | 145340620435425 |
[1,1,5,15,81,237,1015,3891,16171,66237,297003, 1304467,5981617,27407859,126441771,584452845, 2721978059,12719931479,59862174023,282898499059, 1341705275365,6380905008633,30422523202843, 145340620435425] |