n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 1 |
4 | 4 |
5 | 6 |
6 | 456 |
7 | 6240 |
8 | 10936320 |
9 | 1225566720 |
10 | 130025295912960 |
11 | 252282619805368320 |
12 | 2209617218725251404267520 |
13 | 98758655816833727741338583040 |
[1,1,1,1,4,6,456,6240,10936320,1225566720, 130025295912960,252282619805368320, 2209617218725251404267520, 98758655816833727741338583040] |