# A048604 (b-file synthesized from sequence entry)
0 1
1 6
2 120
3 1680
4 362880
5 7983360
6 6227020800
7 186810624000
8 355687428096000
9 121645100408832000
10 51090942171709440000
11 213653030899875840000
12 1723467782592331776000000
13 64431180179990249472000000