n | a(n) |
---|---|
1 | 0 |
2 | 3 |
3 | 8 |
4 | 21 |
5 | 64 |
6 | 183 |
7 | 528 |
8 | 1529 |
9 | 4416 |
10 | 12763 |
11 | 36888 |
12 | 106605 |
13 | 308096 |
14 | 890415 |
15 | 2573344 |
16 | 7437105 |
17 | 21493632 |
18 | 62117747 |
19 | 179523624 |
20 | 518832901 |
21 | 1499454912 |
22 | 4333505127 |
23 | 12524062256 |
24 | 36195211689 |
25 | 104606103232 |
26 | 302317249227 |
27 | 873713066040 |
[0,3,8,21,64,183,528,1529,4416,12763,36888,106605, 308096,890415,2573344,7437105,21493632,62117747, 179523624,518832901,1499454912,4333505127, 12524062256,36195211689,104606103232,302317249227, 873713066040] |