# A126675 (b-file synthesized from sequence entry)
2 1
3 3
4 33
5 1650
6 452100
7 797504400
8 10421787499200
9 1142061161312332800
10 1172412578735369356492800
11 12461151230849896157193633792000
12 1502115020187372946389364240841441280000
13 2232808176698576782065092183525365599594086400000
14 44215762305703658726173614105740272696666814788141056000000