n | a(n) |
---|---|
0 | 1 |
1 | 5 |
2 | 20 |
3 | 67 |
4 | 209 |
5 | 630 |
6 | 1873 |
7 | 5540 |
8 | 16357 |
9 | 48265 |
10 | 142387 |
11 | 420027 |
12 | 1239006 |
13 | 3654820 |
14 | 10780958 |
15 | 31801551 |
16 | 93807834 |
17 | 276713194 |
18 | 816245143 |
19 | 2407749755 |
20 | 7102350204 |
21 | 20950424039 |
22 | 61799299470 |
23 | 182294802589 |
24 | 537730934397 |
[1,5,20,67,209,630,1873,5540,16357,48265,142387, 420027,1239006,3654820,10780958,31801551,93807834, 276713194,816245143,2407749755,7102350204, 20950424039,61799299470,182294802589,537730934397] |