n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 6 |
3 | 16 |
4 | 46 |
5 | 132 |
6 | 388 |
7 | 1152 |
8 | 3462 |
9 | 10492 |
10 | 32036 |
11 | 98400 |
12 | 303756 |
13 | 941576 |
14 | 2928936 |
15 | 9138176 |
16 | 28584006 |
17 | 89609196 |
18 | 281466916 |
19 | 885620576 |
20 | 2790812196 |
21 | 8806560056 |
22 | 27823745016 |
23 | 88005102336 |
24 | 278637450396 |
25 | 883024243032 |
26 | 2800748951208 |
[1,2,6,16,46,132,388,1152,3462,10492,32036,98400, 303756,941576,2928936,9138176,28584006,89609196, 281466916,885620576,2790812196,8806560056, 27823745016,88005102336,278637450396,883024243032, 2800748951208] |