# A307936 (b-file synthesized from sequence entry)
1 3
2 120
3 18792
4 7547904
5 6210432000
6 9116955648000
7 21746167511040000
8 78775578609057792000
9 411821286886186942464000
10 2985318922218593845248000000
11 29060162328471184917135360000000
12 369984034079871408445744742400000000