n | a(n) |
---|---|
0 | 1 |
1 | 3 |
2 | 6 |
3 | 18 |
4 | 48 |
5 | 144 |
6 | 414 |
7 | 1242 |
8 | 3678 |
9 | 11034 |
10 | 32958 |
11 | 98874 |
12 | 296208 |
13 | 888624 |
14 | 2664630 |
15 | 7993890 |
16 | 23977992 |
17 | 71933976 |
18 | 215790894 |
19 | 647372682 |
20 | 1942085088 |
21 | 5826255264 |
22 | 17478666918 |
23 | 52436000754 |
24 | 157307706054 |
25 | 471923118162 |
[1,3,6,18,48,144,414,1242,3678,11034,32958,98874, 296208,888624,2664630,7993890,23977992,71933976, 215790894,647372682,1942085088,5826255264, 17478666918,52436000754,157307706054,471923118162] |