n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 2 |
3 | 2 |
4 | 8 |
5 | 14 |
6 | 40 |
7 | 84 |
8 | 216 |
9 | 486 |
10 | 1200 |
11 | 2780 |
12 | 6744 |
13 | 15836 |
14 | 38096 |
15 | 90056 |
16 | 215728 |
17 | 511750 |
18 | 1223136 |
19 | 2907052 |
20 | 6939544 |
21 | 16511028 |
22 | 39386384 |
23 | 93768696 |
24 | 223589648 |
25 | 532502748 |
26 | 1269433376 |
27 | 3023953560 |
28 | 7207744496 |
29 | 17172061944 |
30 | 40926792224 |
31 | 97513876880 |
32 | 232395416672 |
[1,0,2,2,8,14,40,84,216,486,1200,2780,6744,15836, 38096,90056,215728,511750,1223136,2907052,6939544, 16511028,39386384,93768696,223589648,532502748, 1269433376,3023953560,7207744496,17172061944, 40926792224,97513876880,232395416672] |