# A354612 (b-file synthesized from sequence entry)
0 1
1 0
2 2
3 -3
4 32
5 -150
6 1404
7 -11340
8 120448
9 -1319976
10 16600320
11 -223664760
12 3300331704
13 -52223268240
14 887583503520
15 -16071609481200
16 309263446333440
17 -6296705309543040
18 135262191966465600
19 -3056359409652695040
20 72462969268541596800