n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 0 |
3 | 0 |
4 | 1 |
5 | 10 |
6 | 65 |
7 | 350 |
8 | 1701 |
9 | 7771 |
10 | 34150 |
11 | 146905 |
12 | 633776 |
13 | 2892032 |
14 | 15526876 |
15 | 109484545 |
16 | 992589171 |
17 | 10223409493 |
18 | 108982611518 |
19 | 1156117871286 |
20 | 12062817285396 |
21 | 123603289559039 |
22 | 1245986248828926 |
23 | 12391614409960544 |
24 | 121996350285087172 |
[0,0,0,0,1,10,65,350,1701,7771,34150,146905, 633776,2892032,15526876,109484545,992589171, 10223409493,108982611518,1156117871286, 12062817285396,123603289559039,1245986248828926, 12391614409960544,121996350285087172] |