# A152886 (b-file synthesized from sequence entry)
1 0
2 0
3 0
4 6
5 24
6 360
7 2160
8 30240
9 241920
10 3628800
11 36288000
12 598752000
13 7185024000
14 130767436800
15 1830744115200
16 36614882304000
17 585838116864000
18 12804747411456000
19 230485453406208000
20 5474029518397440000
21 109480590367948800000
22 2810001819444019200000