n | a(n) |
---|---|
1 | 1 |
2 | 3 |
3 | 7 |
4 | 18 |
5 | 46 |
6 | 120 |
7 | 316 |
8 | 840 |
9 | 2248 |
10 | 6048 |
11 | 16336 |
12 | 44256 |
13 | 120160 |
14 | 326784 |
15 | 889792 |
16 | 2424960 |
17 | 6613120 |
18 | 18043392 |
19 | 49247488 |
20 | 134450688 |
21 | 367134208 |
22 | 1002645504 |
23 | 2738510848 |
24 | 7480215552 |
25 | 20433258496 |
26 | 55818559488 |
27 | 152486858752 |
[1,3,7,18,46,120,316,840,2248,6048,16336,44256, 120160,326784,889792,2424960,6613120,18043392, 49247488,134450688,367134208,1002645504, 2738510848,7480215552,20433258496,55818559488, 152486858752] |