# A307935 (b-file synthesized from sequence entry)
1 0
2 4
3 120
4 6912
5 631680
6 84211200
7 15432560640
8 3722677862400
9 1143584003358720
10 435902085306777600
11 201889940373209088000
12 111673403387053395148800
13 72713691524377589317632000
14 55052849030095232395798118400
15 47957058157063329359371173888000