n | a(n) |
---|---|
0 | 1 |
1 | 20 |
2 | 380 |
3 | 7201 |
4 | 136440 |
5 | 2585160 |
6 | 48981601 |
7 | 928065260 |
8 | 17584258340 |
9 | 333172843201 |
10 | 6312699762480 |
11 | 119608122643920 |
12 | 2266241630472001 |
13 | 42938982856324100 |
14 | 813574432639685900 |
15 | 15414975237297708001 |
[1,20,380,7201,136440,2585160,48981601,928065260, 17584258340,333172843201,6312699762480, 119608122643920,2266241630472001, 42938982856324100,813574432639685900, 15414975237297708001] |