# A104003 (b-file synthesized from sequence entry)
4 6
5 306
6 29700
7 4798080
8 1178634240
9 412483246560
10 195891696000000
11 121597736131872000
12 95776583838282547200
13 93456899248404570278400
14 110767880742079885561036800
15 156855803355661410000000000000
16 261695274412151118929854464000000
17 508262037307349207558239385902080000