n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 4 |
3 | 11 |
4 | 48 |
5 | 153 |
6 | 695 |
7 | 2461 |
8 | 11430 |
9 | 42933 |
10 | 202241 |
11 | 790669 |
12 | 3760536 |
13 | 15125411 |
14 | 72443050 |
15 | 297652719 |
16 | 1433159704 |
17 | 5986967421 |
18 | 28945946323 |
19 | 122535705935 |
20 | 594410042334 |
21 | 2543786121717 |
22 | 12373361059432 |
23 | 53434246508299 |
24 | 260504421338140 |
25 | 1133661768994795 |
26 | 5537534006629171 |
27 | 24257661377551561 |
[1,1,4,11,48,153,695,2461,11430,42933,202241, 790669,3760536,15125411,72443050,297652719, 1433159704,5986967421,28945946323,122535705935, 594410042334,2543786121717,12373361059432, 53434246508299,260504421338140,1133661768994795, 5537534006629171,24257661377551561] |