n | a(n) |
---|---|
1 | 0 |
2 | 0 |
3 | 0 |
4 | 2 |
5 | 4 |
6 | 4 |
7 | 7 |
8 | 18 |
9 | 25 |
10 | 54 |
11 | 105 |
12 | 178 |
13 | 332 |
14 | 637 |
15 | 1165 |
16 | 2194 |
17 | 4161 |
18 | 7770 |
19 | 14800 |
20 | 28100 |
21 | 53525 |
22 | 102394 |
23 | 195938 |
24 | 377301 |
25 | 723938 |
26 | 1391620 |
27 | 2684760 |
28 | 5178439 |
29 | 10010119 |
30 | 19362205 |
31 | 37501838 |
32 | 72702221 |
33 | 141062816 |
34 | 273985225 |
35 | 532514962 |
[0,0,0,2,4,4,7,18,25,54,105,178,332,637,1165,2194, 4161,7770,14800,28100,53525,102394,195938,377301, 723938,1391620,2684760,5178439,10010119,19362205, 37501838,72702221,141062816,273985225,532514962] |