n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 0 |
3 | -1 |
4 | -4 |
5 | -12 |
6 | -34 |
7 | -93 |
8 | -248 |
9 | -644 |
10 | -1622 |
11 | -3932 |
12 | -9054 |
13 | -19314 |
14 | -36066 |
15 | -48953 |
16 | 8372 |
17 | 415848 |
18 | 2180870 |
19 | 8609676 |
20 | 29858358 |
21 | 95443242 |
22 | 286747530 |
23 | 815867808 |
24 | 2199049782 |
25 | 5577559986 |
26 | 13083598882 |
27 | 27240793594 |
28 | 44583397354 |
[1,1,0,-1,-4,-12,-34,-93,-248,-644,-1622,-3932, -9054,-19314,-36066,-48953,8372,415848,2180870, 8609676,29858358,95443242,286747530,815867808, 2199049782,5577559986,13083598882,27240793594, 44583397354] |