n | a(n) |
---|---|
0 | 1 |
1 | 3 |
2 | 6 |
3 | 11 |
4 | 24 |
5 | 69 |
6 | 227 |
7 | 753 |
8 | 2451 |
9 | 8004 |
10 | 27138 |
11 | 97806 |
12 | 375313 |
13 | 1511868 |
14 | 6292884 |
15 | 26826701 |
16 | 116994453 |
17 | 523646202 |
18 | 2414394601 |
19 | 11487130362 |
20 | 56341183365 |
21 | 284110648983 |
22 | 1468690344087 |
23 | 7766823788295 |
24 | 41976012524088 |
25 | 231812530642644 |
26 | 1308325741771908 |
[1,3,6,11,24,69,227,753,2451,8004,27138,97806, 375313,1511868,6292884,26826701,116994453, 523646202,2414394601,11487130362,56341183365, 284110648983,1468690344087,7766823788295, 41976012524088,231812530642644,1308325741771908] |