n | a(n) |
---|---|
3 | 0 |
4 | 0 |
5 | 6 |
6 | 4 |
7 | 4 |
8 | 33 |
9 | 55 |
10 | 95 |
11 | 291 |
12 | 628 |
13 | 1309 |
14 | 3349 |
15 | 8195 |
16 | 19803 |
17 | 49968 |
18 | 127374 |
19 | 328464 |
20 | 851809 |
21 | 2221390 |
22 | 5855200 |
23 | 15465224 |
24 | 40887162 |
25 | 108565617 |
26 | 288670285 |
27 | 767774575 |
28 | 2045483183 |
29 | 5456153646 |
30 | 14564067161 |
31 | 38919814973 |
[0,0,6,4,4,33,55,95,291,628,1309,3349,8195,19803, 49968,127374,328464,851809,2221390,5855200, 15465224,40887162,108565617,288670285,767774575, 2045483183,5456153646,14564067161,38919814973] |