# A067630 (b-file synthesized from sequence entry)
0 1
1 6
2 2520
3 7484400
4 81729648000
5 2375880867360000
6 151476660579404160000
7 18608907752179801056000000
8 4015057936610313875842560000000
9 1419041926536183233139035980800000000
10 778117449996850714059458989711872000000000