n | a(n) |
---|---|
1 | 0 |
2 | 0 |
3 | 4 |
4 | 3 |
5 | 10 |
6 | 32 |
7 | 44 |
8 | 176 |
9 | 326 |
10 | 888 |
11 | 2076 |
12 | 5275 |
13 | 12306 |
14 | 32324 |
15 | 74284 |
16 | 195959 |
17 | 460498 |
18 | 1189652 |
19 | 2861016 |
20 | 7307596 |
21 | 17774488 |
22 | 45231012 |
23 | 110756056 |
24 | 281073368 |
25 | 692630902 |
26 | 1752734824 |
27 | 4342317676 |
28 | 10967047059 |
29 | 27278066490 |
30 | 68820679380 |
31 | 171685581996 |
[0,0,4,3,10,32,44,176,326,888,2076,5275,12306, 32324,74284,195959,460498,1189652,2861016,7307596, 17774488,45231012,110756056,281073368,692630902, 1752734824,4342317676,10967047059,27278066490, 68820679380,171685581996] |