# A158260 (b-file synthesized from sequence entry)
2 1
3 2
4 30
5 2240
6 685160
7 810903456
8 3683654668512
9 64657586863790400
10 4426882384548801561472
11 1192052411353154132337483776
12 1270174918862853255008627489608704