n | a(n) |
---|---|
0 | 1 |
1 | 3 |
2 | 9 |
3 | 27 |
4 | 80 |
5 | 232 |
6 | 656 |
7 | 1808 |
8 | 4864 |
9 | 12800 |
10 | 33024 |
11 | 83712 |
12 | 208896 |
13 | 514048 |
14 | 1249280 |
15 | 3002368 |
16 | 7143424 |
17 | 16842752 |
18 | 39387136 |
19 | 91422720 |
20 | 210763776 |
21 | 482869248 |
22 | 1099956224 |
23 | 2492465152 |
24 | 5620367360 |
25 | 12616466432 |
26 | 28202500096 |
27 | 62797119488 |
28 | 139318001664 |
29 | 308029685760 |
[1,3,9,27,80,232,656,1808,4864,12800,33024,83712, 208896,514048,1249280,3002368,7143424,16842752, 39387136,91422720,210763776,482869248,1099956224, 2492465152,5620367360,12616466432,28202500096, 62797119488,139318001664,308029685760] |