n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 4 |
3 | 13 |
4 | 61 |
5 | 304 |
6 | 1747 |
7 | 10945 |
8 | 74830 |
9 | 550687 |
10 | 4335109 |
11 | 36272086 |
12 | 320980645 |
13 | 2991373597 |
14 | 29253607780 |
15 | 299258487553 |
16 | 3193634980753 |
17 | 35469069928792 |
18 | 409082335024591 |
19 | 4890313138089133 |
20 | 60489400453642822 |
21 | 772967507343358171 |
22 | 10189818916331129017 |
23 | 138398721137005215526 |
[1,1,4,13,61,304,1747,10945,74830,550687,4335109, 36272086,320980645,2991373597,29253607780, 299258487553,3193634980753,35469069928792, 409082335024591,4890313138089133, 60489400453642822,772967507343358171, 10189818916331129017,138398721137005215526] |