n | a(n) |
---|---|
2 | 0 |
3 | 3 |
4 | 13 |
5 | 50 |
6 | 201 |
7 | 875 |
8 | 4138 |
9 | 21145 |
10 | 115973 |
11 | 678568 |
12 | 4213595 |
13 | 27644435 |
14 | 190899320 |
15 | 1382958543 |
16 | 10480142145 |
17 | 82864869802 |
18 | 682076806157 |
19 | 5832742205055 |
20 | 51724158235370 |
21 | 474869816156749 |
22 | 4506715738447321 |
23 | 44152005855084344 |
24 | 445958869294805287 |
25 | 4638590332229999351 |
[0,3,13,50,201,875,4138,21145,115973,678568, 4213595,27644435,190899320,1382958543,10480142145, 82864869802,682076806157,5832742205055, 51724158235370,474869816156749,4506715738447321, 44152005855084344,445958869294805287, 4638590332229999351] |