n | a(n) |
---|---|
1 | 1 |
2 | 6 |
3 | 16 |
4 | 45 |
5 | 133 |
6 | 400 |
7 | 1204 |
8 | 3561 |
9 | 10554 |
10 | 31493 |
11 | 93784 |
12 | 278862 |
13 | 829809 |
14 | 2469737 |
15 | 7349616 |
16 | 21870896 |
17 | 65083321 |
18 | 193678264 |
19 | 576359005 |
20 | 1715146434 |
21 | 5103989104 |
22 | 15188659597 |
23 | 45198999981 |
24 | 134504868528 |
25 | 400264674436 |
26 | 1191122820729 |
[1,6,16,45,133,400,1204,3561,10554,31493,93784, 278862,829809,2469737,7349616,21870896,65083321, 193678264,576359005,1715146434,5103989104, 15188659597,45198999981,134504868528,400264674436, 1191122820729] |