n | a(n) |
---|---|
0 | 1 |
1 | 3 |
2 | 8 |
3 | 21 |
4 | 58 |
5 | 160 |
6 | 441 |
7 | 1217 |
8 | 3357 |
9 | 9261 |
10 | 25551 |
11 | 70492 |
12 | 194481 |
13 | 536559 |
14 | 1480324 |
15 | 4084101 |
16 | 11267725 |
17 | 31086799 |
18 | 85766121 |
19 | 236622225 |
20 | 652822777 |
21 | 1801088541 |
22 | 4969066720 |
23 | 13709278307 |
24 | 37822859361 |
25 | 104350401111 |
26 | 287894844441 |
27 | 794280046581 |
28 | 2191358423330 |
[1,3,8,21,58,160,441,1217,3357,9261,25551,70492, 194481,536559,1480324,4084101,11267725,31086799, 85766121,236622225,652822777,1801088541, 4969066720,13709278307,37822859361,104350401111, 287894844441,794280046581,2191358423330] |