# A157988 (b-file synthesized from sequence entry)
46 5760
47 270720
48 12994560
49 636733440
50 31836672000
51 1623670272000
52 84430854144000
53 4474835269632000
54 241641104560128000
55 13290260750807040000
56 744254602045194240000
57 42422512316576071680000