# A072043 (b-file synthesized from sequence entry)
1 1
2 1
3 1
4 2
5 3
6 8
7 60
8 1728
9 967680
10 114661785600
11 215698302044209000000
12 26592225368515593301597083402240000000
13 723457119656730571214801208759677424070060705650559470796800000000000