n | a(n) |
---|---|
4 | 1 |
5 | 10 |
6 | 57 |
7 | 245 |
8 | 888 |
9 | 2881 |
10 | 8679 |
11 | 24872 |
12 | 68940 |
13 | 186953 |
14 | 499927 |
15 | 1325204 |
16 | 3494249 |
17 | 9184675 |
18 | 24098536 |
19 | 63165197 |
20 | 165471668 |
21 | 433350754 |
22 | 1134715190 |
23 | 2970971916 |
24 | 7778430788 |
25 | 20364616458 |
26 | 53315795326 |
27 | 139583244540 |
[1,10,57,245,888,2881,8679,24872,68940,186953, 499927,1325204,3494249,9184675,24098536,63165197, 165471668,433350754,1134715190,2970971916, 7778430788,20364616458,53315795326,139583244540] |