n | a(n) |
---|---|
0 | 1 |
1 | 4 |
2 | 16 |
3 | 62 |
4 | 230 |
5 | 812 |
6 | 2728 |
7 | 8752 |
8 | 26944 |
9 | 80000 |
10 | 230144 |
11 | 644096 |
12 | 1759744 |
13 | 4707328 |
14 | 12359680 |
15 | 31920128 |
16 | 81231872 |
17 | 204013568 |
18 | 506331136 |
19 | 1243217920 |
20 | 3022913536 |
21 | 7285243904 |
22 | 17415274496 |
23 | 41321234432 |
24 | 97370767360 |
25 | 227993976832 |
26 | 530713673728 |
[1,4,16,62,230,812,2728,8752,26944,80000,230144, 644096,1759744,4707328,12359680,31920128,81231872, 204013568,506331136,1243217920,3022913536, 7285243904,17415274496,41321234432,97370767360, 227993976832,530713673728] |