# A061464 (b-file synthesized from sequence entry)
0 1
1 1
2 4
3 108
4 6912
5 21600000
6 583200000
7 480290277600000
8 31476303632793600000
9 16727798278915463577600000
10 52274369621610823680000000000
11 14914487726878692033020558868480000000000