n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 6 |
3 | 114 |
4 | 978 |
5 | 6810 |
6 | 43746 |
7 | 271194 |
8 | 1653378 |
9 | 9998970 |
10 | 60229986 |
11 | 362088474 |
12 | 2174656578 |
13 | 13054316730 |
14 | 78345032226 |
15 | 470127588954 |
16 | 2820937720578 |
17 | 16926142884090 |
18 | 101558406986466 |
19 | 609355090964634 |
20 | 3656144492925378 |
[0,0,6,114,978,6810,43746,271194,1653378,9998970, 60229986,362088474,2174656578,13054316730, 78345032226,470127588954,2820937720578, 16926142884090,101558406986466,609355090964634, 3656144492925378] |