n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 4 |
3 | 9 |
4 | 29 |
5 | 82 |
6 | 255 |
7 | 773 |
8 | 2410 |
9 | 7499 |
10 | 23575 |
11 | 74298 |
12 | 235325 |
13 | 747407 |
14 | 2381126 |
15 | 7603433 |
16 | 24332595 |
17 | 78013192 |
18 | 250540055 |
19 | 805803691 |
20 | 2595158718 |
21 | 8368026845 |
22 | 27012184877 |
23 | 87283372610 |
24 | 282294378071 |
25 | 913775677281 |
26 | 2960160734818 |
[1,1,4,9,29,82,255,773,2410,7499,23575,74298, 235325,747407,2381126,7603433,24332595,78013192, 250540055,805803691,2595158718,8368026845, 27012184877,87283372610,282294378071,913775677281, 2960160734818] |