n | a(n) |
---|---|
1 | 1 |
2 | 5 |
3 | 35 |
4 | 206 |
5 | 1654 |
6 | 13524 |
7 | 130668 |
8 | 1262064 |
9 | 15027696 |
10 | 178581600 |
11 | 2407111200 |
12 | 33276182400 |
13 | 514020643200 |
14 | 8130342124800 |
15 | 144621487584000 |
16 | 2537556118272000 |
17 | 49206063078144000 |
18 | 982811803276800000 |
19 | 20991083543732736000 |
20 | 454612169591580672000 |
21 | 10763306565511514112000 |
[1,5,35,206,1654,13524,130668,1262064,15027696, 178581600,2407111200,33276182400,514020643200, 8130342124800,144621487584000,2537556118272000, 49206063078144000,982811803276800000, 20991083543732736000,454612169591580672000, 10763306565511514112000] |