n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 2 |
4 | 6 |
5 | 12 |
6 | 30 |
7 | 78 |
8 | 186 |
9 | 414 |
10 | 912 |
11 | 2064 |
12 | 4338 |
13 | 9798 |
14 | 20106 |
15 | 40974 |
16 | 80196 |
17 | 158322 |
18 | 309414 |
19 | 615558 |
20 | 1212402 |
21 | 2417136 |
22 | 4776654 |
23 | 9497508 |
24 | 18726708 |
25 | 37056150 |
26 | 72946116 |
27 | 144230640 |
28 | 284660874 |
29 | 564451830 |
30 | 1118803818 |
31 | 2224792026 |
32 | 4420041210 |
33 | 8791590168 |
[1,1,1,2,6,12,30,78,186,414,912,2064,4338,9798, 20106,40974,80196,158322,309414,615558,1212402, 2417136,4776654,9497508,18726708,37056150, 72946116,144230640,284660874,564451830,1118803818, 2224792026,4420041210,8791590168] |