n | a(n) |
---|---|
1 | 1 |
2 | 6 |
3 | 18 |
4 | 48 |
5 | 131 |
6 | 363 |
7 | 1017 |
8 | 2873 |
9 | 8169 |
10 | 23349 |
11 | 67024 |
12 | 193086 |
13 | 557949 |
14 | 1616501 |
15 | 4694034 |
16 | 13657896 |
17 | 39809649 |
18 | 116218701 |
19 | 339762942 |
20 | 994553160 |
21 | 2914608177 |
22 | 8550424953 |
23 | 25107964077 |
24 | 73793368593 |
25 | 217057617567 |
26 | 638936722403 |
27 | 1882096946232 |
28 | 5547613247418 |
[1,6,18,48,131,363,1017,2873,8169,23349,67024, 193086,557949,1616501,4694034,13657896,39809649, 116218701,339762942,994553160,2914608177, 8550424953,25107964077,73793368593,217057617567, 638936722403,1882096946232,5547613247418] |