n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 2 |
3 | 4 |
4 | 12 |
5 | 26 |
6 | 60 |
7 | 145 |
8 | 336 |
9 | 796 |
10 | 1880 |
11 | 4412 |
12 | 10400 |
13 | 24488 |
14 | 57648 |
15 | 135794 |
16 | 319744 |
17 | 752908 |
18 | 1773016 |
19 | 4175032 |
20 | 9831472 |
21 | 23151400 |
22 | 54516976 |
23 | 128377380 |
24 | 302304640 |
25 | 711870368 |
26 | 1676321856 |
27 | 3947423264 |
28 | 9295440640 |
29 | 21889019712 |
30 | 51544533376 |
31 | 121377706184 |
[0,1,2,4,12,26,60,145,336,796,1880,4412,10400, 24488,57648,135794,319744,752908,1773016,4175032, 9831472,23151400,54516976,128377380,302304640, 711870368,1676321856,3947423264,9295440640, 21889019712,51544533376,121377706184] |