# A365293 (b-file synthesized from sequence entry)
0 1
1 1
2 4
3 24
4 192
5 1800
6 20880
7 282240
8 4354560
9 75479040
10 1455148800
11 30855686400
12 713712384000
13 17884003737600
14 482619020083200
15 13954193180928000
16 430360865206272000
17 14102295149150208000
18 489295008086556672000
19 17919783031425859584000