n | a(n) |
---|---|
0 | 18 |
1 | 90 |
2 | 270 |
3 | 666 |
4 | 1494 |
5 | 3186 |
6 | 6606 |
7 | 13482 |
8 | 27270 |
9 | 54882 |
10 | 110142 |
11 | 220698 |
12 | 441846 |
13 | 884178 |
14 | 1768878 |
15 | 3538314 |
16 | 7077222 |
17 | 14155074 |
18 | 28310814 |
19 | 56622330 |
20 | 113245398 |
21 | 226491570 |
22 | 452983950 |
23 | 905968746 |
24 | 1811938374 |
25 | 3623877666 |
26 | 7247756286 |
27 | 14495513562 |
28 | 28991028150 |
[18,90,270,666,1494,3186,6606,13482,27270,54882, 110142,220698,441846,884178,1768878,3538314, 7077222,14155074,28310814,56622330,113245398, 226491570,452983950,905968746,1811938374, 3623877666,7247756286,14495513562,28991028150] |