# A167141 (b-file synthesized from sequence entry)
0 1
1 4
2 48
3 864
4 20880
5 632448
6 23018688
7 978179328
8 47529084096
9 2598928566336
10 157937795847936
11 10559489876375040
12 770269715428025088
13 60876094422772800000
14 5181654464327251948032
15 472584847824904789910016